Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, such as, surround sound systems; Audio equipment for vehicles, such as, loudspeakers for automotive audio systems; Audio equipment for vehicles, such as, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Semiconductors; Speaker microphones; Valve amplifiers; Automated valves for smartphones; Consumer audio devices, such as, headphones, wired and wireless earbuds, and hearing aid devices; Automatic control valves; Consumer electronic products, such as, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semiconductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, such as, audio processors; Pressure relief valves for consumer audio devices, such as, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers; Electronic components in the nature of piezo MEMS for fluidic pump; Consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Semiconductor chip sets for use in piezo MEMS fluidic pump; Air quality sensor; Air pump for air quality sensor; Microelectromechanical (MEMS) devices in the nature of piezoelectric transducers for applications in electronic or computer heat dissipation and micro-fluidic pumping; Smartphones; Tablets; Virtual reality goggles; Virtual reality glasses; Virtual reality Headsets; Augmented reality goggles; Augmented reality glasses; Augmented reality Headsets; Laptop computers; Solid state drives; Wireless chargers; 2D packaging; 2.5D packaging; 3D packaging; Chip Scale Package; Flat panel displays; Flat panel televisions; Projectors; Monitors; Desktop computers; Computer servers; Video recording devices; Consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; Augmented virtuality devices; Augmented reality devices; Virtual reality devices; Audiovisual devices, such as, camcorders, video recording and broadcasting devices; Computing devices including computers, such as, desktops, laptops, notebooks, tablets, computer servers; Audio speakers, such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids.

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, such as, surround sound systems; Audio equipment for vehicles, such as, loudspeakers for automotive audio systems; Audio equipment for vehicles, such as, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Semiconductors; Speaker microphones; Valve amplifiers; Automated valves for smartphones; Consumer audio devices, such as, headphones, wired and wireless earbuds, and hearing aid devices; Automatic control valves; Consumer electronic products, such as, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semiconductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, such as, audio processors; Pressure relief valves for consumer audio devices, such as, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers; Electronic components in the nature of piezo MEMS for fluidic pump; Consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Semiconductor chip sets for use in piezo MEMS fluidic pump; Air quality sensor; Air pump for air quality sensor; Microelectromechanical (MEMS) devices in the nature of piezoelectric transducers for applications in electronic or computer heat dissipation and micro-fluidic pumping; Smartphones; Tablets; Virtual reality goggles; Virtual reality glasses; Virtual reality Headsets; Augmented reality goggles; Augmented reality glasses; Augmented reality Headsets; Laptop computers; Solid state drives; Wireless chargers; 2D packaging; 2.5D packaging; 3D packaging; Chip Scale Package; Flat panel displays; Flat panel televisions; Projectors; Monitors; Desktop computers; Computer servers; Video recording devices; Consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; Augmented virtuality devices; Augmented reality devices; Virtual reality devices; Audiovisual devices, such as, camcorders, video recording and broadcasting devices; Computing devices including computers, such as, desktops, laptops, notebooks, tablets, computer servers; Audio speakers, such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids.

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, namely, surround sound systems; Audio equipment for vehicles, namely, loud speakers for automotive audio systems; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Semiconductors; Speaker microphones; Valve amplifiers; Automated valves for smartphones, consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Automatic control valves; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semiconductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, namely, audio processors; Pressure relief valves for consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers.

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, namely, surround sound systems; Audio equipment for vehicles, namely, loud speakers for automotive audio systems; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Semiconductors; Speaker microphones; Valve amplifiers; Automated valves for smartphones, consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Automatic control valves; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semi-conductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, namely, audio processors; Pressure relief valves for consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers.

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, such as, surround sound systems; Audio equipment for vehicles, such as, loudspeakers for automotive audio systems; Audio equipment for vehicles, such as, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Semiconductors; Speaker microphones; Valve amplifiers; Automated valves for smartphones; Consumer audio devices, such as, headphones, wired and wireless earbuds, and hearing aid devices; Automatic control valves; Consumer electronic products, such as, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semiconductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, such as, audio processors; Pressure relief valves for consumer audio devices, such as, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers; Consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; Augmented virtuality devices; Augmented reality devices; Virtual reality devices; Audiovisual devices, such as, camcorders, video recording and broadcasting devices; Computing devices including computers, such as, desktops, laptops, notebooks, tablets, computer servers; Audio speakers, such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids.

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, such as, surround sound systems; Audio equipment for vehicles, such as, loudspeakers for automotive audio systems; Audio equipment for vehicles, such as, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Semiconductors; Speaker microphones; Valve amplifiers; Automated valves for smartphones; Consumer audio devices, such as, headphones, wired and wireless earbuds, and hearing aid devices; Automatic control valves; Consumer electronic products, such as, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semiconductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, such as, audio processors; Pressure relief valves for consumer audio devices, such as, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers; Consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; Augmented virtuality devices; Augmented reality devices; Virtual reality devices; Audiovisual devices, such as, camcorders, video recording and broadcasting devices; Computing devices including computers, such as, desktops, laptops, notebooks, tablets, computer servers; Audio speakers, such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids.

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, such as, surround sound systems; Audio equipment for vehicles, such as, loudspeakers for automotive audio systems; Audio equipment for vehicles, such as, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Semiconductors; Speaker microphones; Valve amplifiers; Automated valves for smartphones; Consumer audio devices, such as, headphones, wired and wireless earbuds, and hearing aid devices; Automatic control valves; Consumer electronic products, such as, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semiconductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, such as, audio processors; Pressure relief valves for consumer audio devices, such as, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers; Consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; Augmented virtuality devices; Augmented reality devices; Virtual reality devices; Audiovisual devices, such as, camcorders, video recording and broadcasting devices; Computing devices including computers, such as, desktops, laptops, notebooks, tablets, computer servers; Audio speakers, such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids.

Goods & Services

Valves for controlling and regulating the flow of gases or liquids not being parts of plumbing, heating, cooling installations or machines; Automatic control valves; Automatic valves for consumer audio earbuds, headphones and medical or consumer hearing aid devices; Control valves for regulating the flow of gases and liquids; Electric valve actuators; Electronic valves for controlling gas or fluids; Pressure relief valves for consumer audio earbuds, headphones and medical or consumer hearing aid devices.

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, such as, surround sound systems; Audio equipment for vehicles, such as, loudspeakers for automotive audio systems; Audio equipment for vehicles, such as, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Semiconductors; Speaker microphones; Valve amplifiers; Automated valves for smartphones; Consumer audio devices, such as, headphones, wired and wireless earbuds, and hearing aid devices; Automatic control valves; Consumer electronic products, such as, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semiconductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, such as, audio processors; Pressure relief valves for consumer audio devices, such as, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers; Consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; Augmented virtuality devices; Augmented reality devices; Virtual reality devices; Audiovisual devices, such as, camcorders, video recording and broadcasting devices; Computing devices including computers, such as, desktops, laptops, notebooks, tablets, computer servers; Audio speakers, such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids.

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, namely, surround sound systems; Audio equipment for vehicles, namely, loud speakers for automotive audio systems; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Semiconductors; Speaker microphones; Valve amplifiers; Automated valves for smartphones, consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Automatic control valves; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semi-conductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, namely, audio processors; Pressure relief valves for consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers.

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, namely, surround sound systems; Audio equipment for vehicles, namely, loud speakers for automotive audio systems; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Semiconductors; Speaker microphones; Valve amplifiers; Automated valves for smartphones, consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Automatic control valves; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semi-conductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, namely, audio processors; Pressure relief valves for consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers.

Abstract

A sound producing package includes a substrate, a covering structure and a sound producing component. The covering structure is disposed on the substrate, wherein the covering structure has a plurality of first openings. The sound producing component is disposed between the substrate and the covering structure, wherein the sound producing component includes a membrane and an actuator, and the sound producing component is configured to generate an acoustic wave.

IPC Classes  ?

• H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
• B81B 7/00 - Microstructural systems
• H04R 1/02 - CasingsCabinetsMountings therein
• H04R 19/02 - Loudspeakers

Abstract

A driving circuit comprises a first capacitor. During a sampling operation, the first capacitor is coupled between a first and a second input terminals. During a transferring operation, an end of the first capacitor receives a voltage and another end of the first capacitor is coupled to a load. The driving circuit produces a first driving signal to drive the load, the first driving signal comprises a plurality of first portions with a first polarity and a plurality of second portions with a second polarity opposite to the first polarity. The plurality of first portions and the plurality of second portions form a generalized DSB-SC modulated component of the first driving signal, which is modulated according to an input signal between the first input terminal and the second input terminal.

IPC Classes  ?

• H03D 1/24 - Homodyne or synchrodyne circuits for demodulation of signals wherein one sideband or the carrier has been wholly or partially suppressed
• H03C 1/54 - Balanced modulators, e.g. bridge type, ring type or double balanced type
• H03C 1/60 - Modulators in which carrier or one sideband is wholly or partially suppressed with one sideband wholly or partially suppressed
• H03D 5/00 - Circuits for demodulating amplitude-modulated or angle-modulated oscillations at will
• H03D 7/16 - Multiple frequency-changing

Abstract

The sound suppression apparatus comprises a sound sensing device, configured to sense a sound; and a sound producing device comprising an air-pulse generating device, configured to generate a plurality of air pulses at an ultrasonic pulse rate. The plurality of air pulses at the ultrasonic pulse rate forms an anti-sound. The anti-sound comprises a component which is configured to suppress the sound.

IPC Classes  ?

• H04R 1/10 - EarpiecesAttachments therefor
• B06B 1/02 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy
• G10K 11/178 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effectsMasking sound by electro-acoustically regenerating the original acoustic waves in anti-phase

Abstract

An acoustic package structure includes a substrate, a covering structure and an acoustic chip. The covering structure is disposed on the substrate and has a plurality of first openings. The acoustic chip is disposed between the substrate and the covering structure, wherein the acoustic chip includes a membrane.

IPC Classes  ?

• H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
• B81B 7/00 - Microstructural systems
• H04R 1/02 - CasingsCabinetsMountings therein
• H04R 7/04 - Plane diaphragms
• H04R 19/00 - Electrostatic transducers

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, such as, surround sound systems; Audio equipment for vehicles, such as, loudspeakers for automotive audio systems; Audio equipment for vehicles, such as, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductors; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Speaker microphones; Valve amplifiers; Automated valves for smartphones; Consumer audio devices, such as, headphones, wired and wireless earbuds, and hearing aid devices; Automatic valves; Consumer electronic products, such as, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semiconductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, such as, audio processors; Pressure relief valves for consumer audio devices, such as, headphones, earbuds, and hearing aid devices.; Signal processors for audio speakers; Consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; Augmented virtuality devices; Augmented reality devices; Virtual reality devices; Audiovisual devices, such as, camcorders, video recording and broadcasting devices; Computing devices including computers, such as, desktops, laptops, notebooks, tablets, computer servers; Audio speakers, such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, such as, surround sound systems; Audio equipment for vehicles, such as, loudspeakers for automotive audio systems; Audio equipment for vehicles, such as, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductors; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Speaker microphones; Valve amplifiers; Automated valves for smartphones; Consumer audio devices, such as, headphones, wired and wireless earbuds, and hearing aid devices; Automatic valves; Consumer electronic products, such as, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semiconductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, such as, audio processors; Pressure relief valves for consumer audio devices, such as, headphones, earbuds, and hearing aid devices.; Signal processors for audio speakers; Consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; Augmented virtuality devices; Augmented reality devices; Virtual reality devices; Audiovisual devices, such as, camcorders, video recording and broadcasting devices; Computing devices including computers, such as, desktops, laptops, notebooks, tablets, computer servers; Audio speakers, such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids

Goods & Services

Audio amplifiers; audio and visual headsets for use in playing video games; audio circuit boards; audio electronic components such as surround sound systems; audio equipment for vehicles such as loudspeakers for automotive audio systems; audio equipment for vehicles such as stereos, speakers, amplifiers, equalizers, crossovers, and speaker housings; audio headphones; audio receivers; audio speakers; audio speakers for automobiles; semiconductors; semiconductor chip sets; semiconductor chip sets for use in piezo MEMS speakers and valves; semiconductor chips; semiconductor devices; speaker microphones; valve amplifiers; automated valves for smartphones; consumer audio devices such as headphones, wired and wireless earbuds, and hearing aid devices; automatic valves; consumer electronic products such as audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; control valves for regulating the flow of gases and liquids; electric audio playback units; electric valve actuators; electric audio playback units with lights and speakers; electronic semiconductors; electronic valves for controlling gas or fluids; electronic components in the nature of piezo MEMS speakers and valves; electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals such as audio processors; pressure relief valves for consumer audio devices such as headphones, earbuds, and hearing aid devices; signal processors for audio speakers; electronic components in the nature of piezo MEMS for fluidic pump; consumer audio devices, namely, headphones, earbuds, and hearing aid devices; semiconductor chip sets for use in piezo MEMS fluidic pump; air quality sensors; air pumps for air quality sensors; microelectromechanical (MEMS) devices in the nature of piezoelectric transducers for applications in electronic or computer heat dissipation and micro-fluidic pumping; smartphones; tablets; virtual reality goggles; virtual reality glasses; virtual reality headsets; augmented reality goggles; augmented reality glasses; augmented reality headsets; laptop computers; solid-state drives; wireless chargers; 2D packaging; 2.5D packaging; 3D packaging; chip scale packages; flat panel displays; flat panel televisions; projectors; monitors; desktop computers; computer servers; video recording devices; consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; augmented virtuality devices; augmented reality devices; virtual reality devices; audiovisual devices such as camcorders, video recording, and broadcasting devices; computing devices including computers such as desktops, laptops, notebooks, tablets, computer servers; audio speakers such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids

Abstract

A venting device includes an anchor structure and a membrane. The membrane is anchored on the anchor structure and configured to form a first vent and a second vent. The membrane includes a first flap, a second flap and a third flap. The membrane partitions a space into a first volume and a second volume, and the first volume and the second volume are connected when the first vent and the second vent are formed. The first flap is actuated to move toward a first direction and the second flap is actuated to move toward a second direction opposite to the first direction, so as to form the first vent. The first flap is actuated to move toward the first direction and the third flap is actuated to move toward the second direction opposite to the first direction, so as to form the second vent.

IPC Classes  ?

• B81B 3/00 - Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
• H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Goods & Services

Audio amplifiers; audio and visual headsets for use in playing video games; audio circuit boards; audio electronic components such as surround sound systems; audio equipment for vehicles such as loudspeakers for automotive audio systems; audio equipment for vehicles such as stereos, speakers, amplifiers, equalizers, crossovers, and speaker housings; audio headphones; audio receivers; audio speakers; audio speakers for automobiles; semiconductors; semiconductor chip sets; semiconductor chip sets for use in piezo MEMS speakers and valves; semiconductor chips; semiconductor devices; speaker microphones; valve amplifiers; automated valves for smartphones; consumer audio devices such as headphones, wired and wireless earbuds, and hearing aid devices; automatic valves; consumer electronic products such as audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; control valves for regulating the flow of gases and liquids; electric audio playback units; electric valve actuators; electric audio playback units with lights and speakers; electronic semiconductors; electronic valves for controlling gas or fluids; electronic components in the nature of piezo MEMS speakers and valves; electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals such as audio processors; pressure relief valves for consumer audio devices such as headphones, earbuds, and hearing aid devices; signal processors for audio speakers; electronic components in the nature of piezo MEMS for fluidic pump; consumer audio devices, namely, headphones, earbuds, and hearing aid devices; semiconductor chip sets for use in piezo MEMS fluidic pump; air quality sensors; air pumps for air quality sensors; microelectromechanical (MEMS) devices in the nature of piezoelectric transducers for applications in electronic or computer heat dissipation and micro-fluidic pumping; smartphones; tablets; virtual reality goggles; virtual reality glasses; virtual reality headsets; augmented reality goggles; augmented reality glasses; augmented reality headsets; laptop computers; solid-state drives; wireless chargers; 2D packaging; 2.5D packaging; 3D packaging; chip scale packages; flat panel displays; flat panel televisions; projectors; monitors; desktop computers; computer servers; video recording devices; consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; augmented virtuality devices; augmented reality devices; virtual reality devices; audiovisual devices such as camcorders, video recording, and broadcasting devices; computing devices including computers such as desktops, laptops, notebooks, tablets, computer servers; audio speakers such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, such as, surround sound systems; Audio equipment for vehicles, such as, loudspeakers for automotive audio systems; Audio equipment for vehicles, such as, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductors; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Speaker microphones; Valve amplifiers; Automated valves for smartphones; Consumer audio devices, such as, headphones, wired and wireless earbuds, and hearing aid devices; Automatic valves; Consumer electronic products, such as, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semiconductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, such as, audio processors; Pressure relief valves for consumer audio devices, such as, headphones, earbuds, and hearing aid devices.; Signal processors for audio speakers; Consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; Augmented virtuality devices; Augmented reality devices; Virtual reality devices; Audiovisual devices, such as, camcorders, video recording and broadcasting devices; Computing devices including computers, such as, desktops, laptops, notebooks, tablets, computer servers; Audio speakers, such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, such as, surround sound systems; Audio equipment for vehicles, such as, loudspeakers for automotive audio systems; Audio equipment for vehicles, such as, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductors; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Speaker microphones; Valve amplifiers; Automated valves for smartphones; Consumer audio devices, such as, headphones, wired and wireless earbuds, and hearing aid devices; Automatic valves; Consumer electronic products, such as, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semiconductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, such as, audio processors; Pressure relief valves for consumer audio devices, such as, headphones, earbuds, and hearing aid devices.; Signal processors for audio speakers; Consumer electronics such as smartphones, TVs, monitors, projectors, game consoles; Augmented virtuality devices; Augmented reality devices; Virtual reality devices; Audiovisual devices, such as, camcorders, video recording and broadcasting devices; Computing devices including computers, such as, desktops, laptops, notebooks, tablets, computer servers; Audio speakers, such as standalone speakers, speaker in desktop, wireless earbuds, TWS (true wireless stereo) earbuds, OWS (open wearable stereo) wireless earbuds, headphones, hearing aids

Abstract

An air-pulse generating device, a wearable sound device, a fanless blower, and an airflow producing method are disclosed. The air-pulse generating device includes a film structure, configured to be actuated to generate a plurality of air pulses at an ultrasonic pulse rate. The plurality of air pulses produces a net airflow toward one single direction.

IPC Classes  ?

• H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
• F04B 45/04 - Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
• H04R 1/42 - Combinations of transducers with fluid-pressure or other non-electrical amplifying means

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, namely, surround sound systems; Audio equipment for vehicles, namely, loud speakers for automotive audio systems; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Semiconductors; Speaker microphones; Valve amplifiers; Automated valves for smartphones, consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Automatic valves; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semi-conductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, namely, audio processors; Pressure relief valves for consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers

Abstract

A cantilever structure includes an anchor portion and a film structure. The film structure covers over a cavity and vibrates within the cavity. A length of the film structure is less than a width of the film structure. The anchor portion includes at least one protrusion protruding toward the cavity, and the film structure is anchored on the anchor portion with the at least one protrusion.

IPC Classes  ?

• B81B 3/00 - Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes

Abstract

A wearable sound device includes a venting module, configured to form at least one vent to connect a volume within the wearable sound device and ambient, and a sound producing device, configured to produce sound according to an equalized input signal. The venting module, including at least one venting device, operates among a plurality of statuses corresponding to a plurality of degrees of opening. A controller generates the equalized input signal according to a degree of opening among the plurality of degrees of opening, in order to counteract a roll off caused by the at least one vent.

IPC Classes  ?

• B81B 3/00 - Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
• H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Abstract

An acoustic device includes a first sound producing component and a back cavity structure. The first sound producing component has a first front side and a first back side, wherein the first sound producing component is a high frequency sound unit, and the first front side faces a sound propagating opening of the acoustic device. The back cavity structure is connected to the first back side of the first sound producing component. The first sound producing component produces a first acoustic wave from the first front side towards the sound propagating opening, and the first sound producing component produces a second acoustic wave from the first back side towards a back cavity of the back cavity structure. The back cavity structure is configured to flatten a peak or a dip of a frequency response of the first sound producing component.

IPC Classes  ?

• H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
• H04R 1/10 - EarpiecesAttachments therefor
• H04R 1/24 - Structural combinations of separate transducers or of parts of the same transducer and responsive respectively to two or more frequency ranges
• H04R 19/02 - Loudspeakers

Abstract

A demodulation signal generator, coupled to an air-pulse generator comprising a flap pair, includes a resonance circuit. The resonance circuit produces a first demodulation signal and a second demodulation signal. The resonance circuit and the flap pair co-perform a resonance operation, such that the first demodulation signal and the second demodulation signal are generated via the co-performed resonance operation and have opposite polarity. The flap pair performs a differential movement to form an opening to perform a demodulation operation on a modulated air pressure variation.

IPC Classes  ?

• H03B 5/12 - Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
• H03B 5/30 - Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator

Abstract

A venting device includes a first flap, which is configured to be actuated to swing upward during a rising time, and a second flap, which is disposed opposite to the first flap and configured to be actuated to swing downward during a falling time, a first actuating portion disposed on the first flap, and a second actuating portion disposed on the second flap. The venting device configured to form a vent is disposed within a wearable sound device or to be disposed within the wearable sound device. The vent is formed via applying a first voltage to the first actuating portion and applying a second voltage on the second actuating portion, such that the venting device gradually forms the vent.

IPC Classes  ?

• H04R 1/10 - EarpiecesAttachments therefor

Abstract

A speaker system includes a first acoustic transducer, a second acoustic transducer and a spreading structure. The first acoustic transducer is configured to generate a first acoustic wave. The second acoustic transducer is configured to generate a second acoustic wave. The spreading structure is disposed over the first acoustic transducer and configured to guide the first acoustic wave to propagate through a sound passage formed within the spreading structure. A directionality of the first acoustic wave is spread at a sound outlet of the spreading structure after the first acoustic wave propagates through the sound passage in the spreading structure.

IPC Classes  ?

• H04R 1/34 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
• H04R 1/10 - EarpiecesAttachments therefor
• H04R 1/24 - Structural combinations of separate transducers or of parts of the same transducer and responsive respectively to two or more frequency ranges
• H04R 19/02 - Loudspeakers

Abstract

A sound producing cell includes a membrane and an actuating layer. The membrane includes a first membrane subpart and a second membrane subpart, wherein the first membrane subpart and the second membrane subpart are opposite to each other. The actuating layer is disposed on the first membrane subpart and the second membrane subpart. The first membrane subpart includes a first anchored edge which is fully or partially anchored, and edges of the first membrane subpart other than the first anchored edge are non-anchored. The second membrane subpart includes a second anchored edge which is fully or partially anchored, and edges of the second membrane subpart other than the second anchored edge are non-anchored.

IPC Classes  ?

• H04R 7/06 - Plane diaphragms comprising a plurality of sections or layers
• B81B 3/00 - Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
• B81C 1/00 - Manufacture or treatment of devices or systems in or on a substrate
• H04R 7/18 - Mounting or tensioning of diaphragms or cones at the periphery
• H04R 19/00 - Electrostatic transducers
• H04R 19/04 - Microphones
• H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Abstract

A package structure includes a cover and a cell disposed within the cover. The cell includes a membrane, an actuating layer and an anchor structure. The membrane includes a first membrane subpart and a second membrane subpart, wherein the first membrane subpart and the second membrane subpart are opposite to each other in a top view. The actuating layer is disposed on the first membrane subpart and the second membrane subpart in the top-view direction. The membrane is anchored by the anchor structure. The first membrane subpart includes a first anchored edge which is fully or partially anchored, and edges of the first membrane subpart other than the first anchored edge are non-anchored. The second membrane subpart includes a second anchored edge which is fully or partially anchored, and edges of the second membrane subpart other than the second anchored edge are non-anchored.

IPC Classes  ?

• H04R 7/06 - Plane diaphragms comprising a plurality of sections or layers
• H04R 7/18 - Mounting or tensioning of diaphragms or cones at the periphery
• H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
• B81C 1/00 - Manufacture or treatment of devices or systems in or on a substrate

Abstract

A driving circuit, configured to drive a venting device, includes a first node, a second node, and an amplifying circuit. The venting device, configured to be controlled to open a vent or seal the vent, includes a film structure, which includes a first flap and a second flap, and an actuator, which includes a first actuating portion disposed on the first flap and a second actuating portion disposed on the second flap. When the venting device is controlled to open the vent, the driving circuit generates a first voltage at the first node and generates a second voltage at the second node. When the venting device is controlled to seal the vent, the driving circuit generates a third voltage at both the first node and the second node. The first voltage is larger than the third voltage, and the third voltage is larger than the second voltage.

IPC Classes  ?

• H04R 1/10 - EarpiecesAttachments therefor

Abstract

A method is applied in a controller within a driving circuit comprising a driving sub-circuit configured to drive a load. The method comprises steps of: performing a table learning operation on a table at least at a first rate during a learning period; and performing the table learning operation on the table at a second rate lower than the first rate after the learning period; wherein the table is stored in a memory within the controller. The table learning operation comprises steps of: receiving a first feedback signal from the load corresponding to a first cycle; obtaining a control code from the table according to the first feedback signal; generating a control signal according to the control code; receiving a second feedback signal from the load corresponding to the second cycle; and updating the control code and saving the updated control code back to the table in the memory.

IPC Classes  ?

• H04R 3/00 - Circuits for transducers
• H03K 3/017 - Adjustment of width or dutycycle of pulses

Abstract

An acoustic impedance measuring system configured to measure an acoustic impedance of an acoustic component includes a first chamber, a second chamber, a first sound pressure sensing device, a second sound pressure sensing device and a sound source. The first sound pressure sensing device is configured to sense a sound pressure in the first chamber. The second sound pressure sensing device is configured to sense a sound pressure in the second chamber. The sound source is connected to the first chamber, wherein the sound source generates a sound propagating towards a first cavity inside the first chamber. The acoustic component is disposed between the first chamber and the second chamber for being measured the acoustic impedance of the acoustic component, and the acoustic impedance of the acoustic component is measured by the first sound pressure sensing device and the second sound pressure sensing device.

IPC Classes  ?

• G01M 7/02 - Vibration-testing

Abstract

An air-pulse generating device includes a film structure. The film structure is driven by a modulation-driving signal, so as to form an amplitude-modulated ultrasonic air pressure variation with an ultrasonic carrier frequency. The film structure is driven by a first demodulation-driving signal and a second demodulation-driving signal, so as to form an opening at a rate synchronous with the ultrasonic carrier frequency. The air-pulse generating device produces a plurality of air pulses according to the amplitude-modulated ultrasonic air pressure variation.

IPC Classes  ?

• H04R 23/00 - Transducers other than those covered by groups
• H04R 3/04 - Circuits for transducers for correcting frequency response
• H04R 7/06 - Plane diaphragms comprising a plurality of sections or layers
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers

Abstract

An air-pulse generating device includes a film structure. The film structure is actuated such that the air-pulse generating device produces a plurality of air pulses. A horn-shaped outlet is formed within the air-pulse generating device, and the plurality of air pulses is propagated via the horn-shaped outlet.

IPC Classes  ?

• H04R 23/00 - Transducers other than those covered by groups
• H04R 7/04 - Plane diaphragms

Abstract

An air-pulse generating device includes a film structure including a flap pair. The film structure is actuated to perform a common mode movement, so as to form an amplitude-modulated ultrasonic air pressure variation with an ultrasonic carrier frequency. The film structure is actuated to perform a differential mode movement, so as to form an opening at a rate synchronous with the ultrasonic carrier frequency. The air-pulse generating device produces a plurality of air pulses according to the amplitude-modulated ultrasonic air pressure variation.

IPC Classes  ?

• H04R 23/00 - Transducers other than those covered by groups
• H04R 1/02 - CasingsCabinetsMountings therein
• H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
• H04R 3/04 - Circuits for transducers for correcting frequency response
• H04R 7/06 - Plane diaphragms comprising a plurality of sections or layers
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers

Abstract

A feedback control system configured to drive a load is disclosed. The feedback control system includes an up-sampling circuit, configured to perform an un-sampling operation on a source signal and produce an up-sampled signal with an up-sampling frequency according to the up-sampled signal and a feedback signal from the load; a delta circuit, coupled to the up-sampling circuit and configured to produce a delta signal; a sigma circuit, configured to produce a density modulation signal according to the delta signal; and a driving device, configured to drive the load according to the density modulation signal with the up-sampling frequency.

IPC Classes  ?

• H03M 3/00 - Conversion of analogue values to or from differential modulation

Abstract

The present invention discloses a feedback control system. The feedback control system comprises a plant, configured to produce an output according to a control signal; a first summing block, configured to produce a first difference between an input signal and a measured output signal; a first controller, configured to generate the control signal, such that the first difference decreases to be less than a first threshold or is less than the first threshold; wherein the first controller comprises a memory configured to store a table, and the table contains information of a plurality of transfer functions corresponding to a plurality of operating conditions; wherein the first controller determines an operating condition under which the plant operates, and chooses to utilize a transfer function corresponding to the operating condition to generate the control signal according to the transfer function and the first difference.

IPC Classes  ?

• G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators

Abstract

An air-pulse generating device includes a film structure. The film structure is driven to form an amplitude-modulated ultrasonic air pressure variation with an ultrasonic carrier frequency. The film structure is driven to form an opening at a rate synchronous with the ultrasonic carrier frequency. The air-pulse generating device produces a plurality of air pulses according to the amplitude-modulated ultrasonic air pressure variation, and the plurality of air pulses is asymmetric.

IPC Classes  ?

• H04R 23/00 - Transducers other than those covered by groups
• H04R 1/30 - Combinations of transducers with horns, e.g. with mechanical matching means
• H04R 7/06 - Plane diaphragms comprising a plurality of sections or layers
• H04R 3/04 - Circuits for transducers for correcting frequency response

Abstract

A method is applied in a pulse width modulation (PWM) controller within a driving circuit including a bidirectional circuit coupled to a load. The method includes steps of: obtaining a pulse width control code (PWCC) from a table stored in a memory within the PWM controller according to a difference between a first feedback signal from the load and an input signal, wherein the PWCC is corresponding to an intended voltage difference, and the first feedback signal is corresponding to a first cycle; generating a plurality of PWM signals according to the PWCC, wherein during a second cycle the bidirectional circuit performs a charging or discharging operation on the load according to the PWM signals; receiving a second feedback signal from the load corresponding to the second cycle; and updating the PWCC according to the first and second feedback signals, and saving the updated PWCC back to the table.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H04R 3/02 - Circuits for transducers for preventing acoustic reaction
• H03K 7/08 - Duration or width modulation
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers
• H02M 3/157 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control

Abstract

A wearable sound device includes a venting device including a film structure and an actuator and a driving circuit configured to be controlled by a controller and to drive the actuator, such that the film structure is controlled to form a vent or to seal the vent. The controller is coupled to a sensing device configured to generate a sensing result and determine whether to seal the vent according to the sensing result. The film structure partitions a space within the wearable sound device into a first volume and a second volume. The first volume is connected to or to be connected to an ear canal of a wearable sound device user. The second volume is connected to or to be connected to an ambient of the wearable sound device. The first volume and the second volume are connected via the vent when the vent is formed.

IPC Classes  ?

• G10K 11/00 - Methods or devices for transmitting, conducting or directing sound in generalMethods or devices for protecting against, or for damping, noise or other acoustic waves in general

Abstract

A successive approximation register (SAR) analog-to-digital converter (ADC) includes a comparator, a threshold generator and a controller. The comparator receives an analog signal and the SAR ADC outputs an output codeword. The comparator performs a plurality of first comparisons and a plurality of second comparisons. The controller determines a plurality of most significant bits of the output codeword according to a plurality of first comparison results corresponding to the first comparisons. The first comparisons are performed by comparing the analog signal with a plurality of first thresholds. The controller determines a plurality of least significant bits of the output codeword according to a plurality of second comparison results corresponding to the second comparisons. The second comparisons are performed by comparing the analog signal with a second threshold. The controller controls the threshold generator to produce the plurality of first thresholds and the second threshold according to the first comparison results.

IPC Classes  ?

• H03M 1/38 - Analogue value compared with reference values sequentially only, e.g. successive approximation type

Abstract

A venting device is disposed within a wearable sound device or to be disposed within the wearable sound device. The venting device includes an anchor structure, a film structure and an actuator. The film structure includes an anchor end anchored on the anchor structure and a free end, and the film structure is configured to form a vent or close the vent. The actuator is disposed on the film structure. The film structure partitions a space into a first volume and a second volume, and the first volume and the second volume are connected via the vent when the vent is formed. The venting device is controlled by the controller to seal the vent when the controller determines to close the vent.

IPC Classes  ?

• H04R 1/10 - EarpiecesAttachments therefor

Abstract

A sound producing cell includes a membrane and an actuating layer. The actuating layer is disposed on the membrane. The membrane is actuated by the actuating layer to produce sound. A plurality of holes is formed on the membrane.

IPC Classes  ?

• H04R 7/06 - Plane diaphragms comprising a plurality of sections or layers
• H04R 7/18 - Mounting or tensioning of diaphragms or cones at the periphery
• H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Abstract

A cell includes a membrane and an actuating layer. The membrane includes a first membrane subpart and a second membrane subpart, wherein the first membrane subpart and the second membrane subpart are opposite to each other. The actuating layer is disposed on the first membrane subpart and the second membrane subpart. The first membrane subpart includes a first anchored edge which is fully or partially anchored, and edges of the first membrane subpart other than the first anchored edge are non-anchored. The second membrane subpart includes a second anchored edge which is fully or partially anchored, and edges of the second membrane subpart other than the second anchored edge are non-anchored.

IPC Classes  ?

• H04R 7/06 - Plane diaphragms comprising a plurality of sections or layers
• B81B 3/00 - Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
• B81C 1/00 - Manufacture or treatment of devices or systems in or on a substrate
• H04R 7/18 - Mounting or tensioning of diaphragms or cones at the periphery
• H04R 19/00 - Electrostatic transducers
• H04R 19/04 - Microphones
• H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Abstract

A method, which is applied in a driving circuit including an analog-to-digital convertor (ADC) and a switching circuit including an inductor and coupled to a load, includes steps of: performing an analog-to-digital conversion on a load voltage of the load at a first rate; and producing at least a current pulse flowing through the inductor at a second rate. Wherein, each current pulse among the at least a current pulse is accomplished within a second cycle corresponding to the second rate, all of the at least a current pulse are accomplished within a first cycle corresponding to the first rate, and a first length of the first cycle is longer than twice of a second length of the second cycle.

IPC Classes  ?

• H03M 7/00 - Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits
• H03M 1/00 - Analogue/digital conversionDigital/analogue conversion
• H03M 1/18 - Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging
• H03M 1/38 - Analogue value compared with reference values sequentially only, e.g. successive approximation type

Abstract

A sound producing cell includes a membrane and an actuating layer. The membrane includes a first membrane subpart and a second membrane subpart, wherein the first membrane subpart and the second membrane subpart are opposite to each other. The actuating layer is disposed on the first membrane subpart and the second membrane subpart. The first membrane subpart includes a first anchored edge which is fully or partially anchored, and edges of the first membrane subpart other than the first anchored edge are non-anchored. The second membrane subpart includes a second anchored edge which is fully or partially anchored, and edges of the second membrane subpart other than the second anchored edge are non-anchored.

IPC Classes  ?

• H04R 25/00 - Deaf-aid sets
• H04R 7/06 - Plane diaphragms comprising a plurality of sections or layers
• H04R 7/18 - Mounting or tensioning of diaphragms or cones at the periphery
• H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Abstract

A manufacturing method for a device includes: providing a wafer including a first layer and a second layer; forming and patterning an actuating material formed on the wafer; patterning the first layer of the wafer to form a trench line; and removing a first part of the second layer. The first layer forms a film structure including a membrane. A slit is formed within and penetrates through the membrane because of the trench line. The film structure is actuated to form a vent temporarily because of the slit. An ear canal and an ambient of a wearable sound device are to be connected via the vent temporarily opened. The slit divides the membrane into a first membrane portion and a second membrane portion. A difference between the displacements of these two membrane portions is larger than a thickness of the membrane when the vent is formed.

IPC Classes  ?

• B81B 3/00 - Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes

Goods & Services

Valves for controlling and regulating the flow of gases or liquids not being parts of plumbing, heating, cooling installations or machines; Automatic valves; Automatic valves for consumer audio earbuds, headphones and medical or consumer hearing aid devices; Control valves for regulating the flow of gases and liquids; Electric valve actuators; Electronic valves for controlling gas or fluids; Pressure relief valves for consumer audio earbuds, headphones and medical or consumer hearing aid devices

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, namely, surround sound systems; Audio equipment for vehicles, namely, loud speakers for automotive audio systems; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductors; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Speaker microphones; Valve amplifiers; Automated valves for smartphones, consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Automatic valves; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semi-conductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, namely, audio processors; Pressure relief valves for consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, namely, surround sound systems; Audio equipment for vehicles, namely, loud speakers for automotive audio systems; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semiconductors; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Speaker microphones; Valve amplifiers; Automated valves for smartphones, consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Automatic valves; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semi-conductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, namely, audio processors; Pressure relief valves for consumer audio devices, namely, headphones, earbuds, and hearing aid devices; Signal processors for audio speakers

Goods & Services

Audio amplifiers; Audio and visual headsets for use in playing video games; Audio circuit boards; Audio electronic components, namely, surround sound systems; Audio equipment for vehicles, namely, loud speakers for automotive audio systems; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Audio receivers; Audio speakers; Audio speakers for automobiles; Semi-conductors; Semiconductor chip sets; Semiconductor chip sets for use in piezo MEMS speakers and valves; Semiconductor chips; Semiconductor devices; Semiconductors; Speaker microphones; Valve amplifiers; Automated valves for smartphones, consumer audio devices, namely, headphones, earbuds, and hearing aid devices.; Automatic valves; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Control valves for regulating the flow of gases and liquids; Electric audio playback units; Electric valve actuators; Electric audio playback units with lights and speakers; Electronic semi-conductors; Electronic valves for controlling gas or fluids; Electronic components in the nature of piezo MEMS speakers and valves; Electronic products for the manipulation of the frequency, time, and amplitude characteristics of audio signals, namely, audio processors; Pressure relief valves for consumer audio devices, namely, headphones, earbuds, and hearing aid devices.; Signal processors for audio speakers

Abstract

A sound producing cell includes a membrane and an actuating layer. The membrane includes a first membrane subpart and a second membrane subpart, wherein the first membrane subpart and the second membrane subpart are opposite to each other. The actuating layer is disposed on the first membrane subpart and the second membrane subpart. The first membrane subpart includes a first anchored edge which is fully or partially anchored, and edges of the first membrane subpart other than the first anchored edge are non-anchored. The second membrane subpart includes a second anchored edge which is fully or partially anchored, and edges of the second membrane subpart other than the second anchored edge are non-anchored.

IPC Classes  ?

• H04R 25/00 - Deaf-aid sets
• H04R 7/06 - Plane diaphragms comprising a plurality of sections or layers
• H04R 7/18 - Mounting or tensioning of diaphragms or cones at the periphery
• H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Abstract

A package structure includes a first substrate and a first device disposed on the first substrate. The first device includes at least one anchor structure, a film structure anchored by the anchor structure and an actuator configured to control the film structure to form a first vent temporarily. The film structure partitions a space into a first volume to be connected to an ear canal and a second volume connected to an ambient of a wearable sound device. The ear canal and the ambient are connected via the first vent when the first vent is opened. The first vent is opened by controlling a first membrane portion and a second membrane portion of the film structure, such that a difference between a first displacement of the first membrane portion and a second displacement of the second membrane portion is larger than a thickness of the film structure.

IPC Classes  ?

• B81B 3/00 - Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
• H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Abstract

A linearity compensation method for a sound producing device (SPD) includes steps of: applying a test signal on a first SPD; obtaining an acoustic measurement result generated from the first SPD according to the test signal; generating a compensation curve according to the acoustic measurement result; and performing a linearity compensation operation on a second SPD according to the compensation curve.

IPC Classes  ?

• H04R 3/00 - Circuits for transducers
• H04R 3/04 - Circuits for transducers for correcting frequency response

Abstract

An air-pulse generating device includes a membrane structure, a valve structure, and a cover structure. A chamber is formed between the membrane structure, the valve structure and the cover structure. An air wave vibrating at an operating frequency is formed within the chamber. The valve structure is configured to be actuated to perform an open-and-close movement to form at least one opening. The at least one opening connects air inside the chamber with air outside the chamber. The open-and-close movement is synchronous with the operating frequency.

IPC Classes  ?

• H04R 1/02 - CasingsCabinetsMountings therein
• H04R 7/04 - Plane diaphragms

Abstract

An air-pulse generating device includes a membrane structure, a valve structure, and a cover structure. A chamber is formed between the membrane structure, the valve structure and the cover structure. An air wave vibrating at an operating frequency is formed within the chamber. The valve structure is configured to be actuated to perform an open-and-close movement to form at least one opening. The at least one opening connects air inside the chamber with air outside the chamber. The open-and-close movement is synchronous with the operating frequency.

IPC Classes  ?

• H04R 23/00 - Transducers other than those covered by groups
• H04R 7/04 - Plane diaphragms

Abstract

An air-pulse generating device includes a membrane structure, a valve structure, and a cover structure. A chamber is formed between the membrane structure, the valve structure and the cover structure. An air wave vibrating at an operating frequency is formed within the chamber. The valve structure is configured to be actuated to perform an open-and-close movement to form at least one opening. The at least one opening connects air inside the chamber with air outside the chamber. The open-and-close movement is synchronous with the operating frequency.

IPC Classes  ?

• H04R 23/00 - Transducers other than those covered by groups
• H04R 7/04 - Plane diaphragms

Abstract

A testing apparatus including a testing platform, a loading device, a testing-signal generating device, a sound sensing device, a control unit, and an unloading device is disclosed. The loading device is configured to load a plurality of under-test devices to the testing platform. The testing-signal generating device is configured to generate at least one testing signal. The plurality of under-test devices receives the at least one testing signal and produces at least one testing sound-according to the at least one testing signal. The sound sensing device is configured to receive the at least one testing sound. The control unit controls the unloading device to unload the plurality of under-test devices from the testing platform and controls the unloading device to categorize the plurality of under-test devices into a plurality of groups according to the at least one testing sound received by the sound sensing device.

IPC Classes  ?

• H04R 29/00 - Monitoring arrangementsTesting arrangements
• B81C 99/00 - Subject matter not provided for in other groups of this subclass

Abstract

A signal density modulation (SDM) encoder includes a first subtractor, a sigma circuit and a multi-bit quantizer. The first subtractor is used for receiving an input signal. The sigma circuit is coupled to the first subtractor. The multi-bit quantizer, coupled to the first subtractor and the sigma circuit, is configured to generate an output signal. The sigma circuit or the multi-bit quantizer produces a first feedback signal to the first subtractor. The first subtractor performs a subtraction operation according to the first feedback signal and the input signal, and generates a delta signal. The sigma circuit performs an operation on the delta signal, such that the SDM encoder has a noise transfer function having a high pass filtering effect. The noise transfer function is a ratio of a quantization error brought by the multi-bit quantizer with respect to the input signal. The output signal has more than two levels.

IPC Classes  ?

• H03M 3/00 - Conversion of analogue values to or from differential modulation
• H03H 17/04 - Recursive filters
• H03H 17/06 - Non-recursive filters
• G10L 19/032 - Quantisation or dequantisation of spectral components
• H03H 17/00 - Networks using digital techniques
• H03F 3/20 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers

Abstract

A filter is disclosed. The filter includes at least one first multiplication approximation unit, for approximating at least one first multiplication operation corresponding to at least one first coefficient with at least one first bit-wise shift operation; and at least one second multiplication approximation unit, for approximating at least one second multiplication operation corresponding to at least one second coefficient with a plurality of second bit-wise shift operations and at least one addition operation.

IPC Classes  ?

• H03K 5/1252 - Suppression or limitation of noise or interference
• G06F 7/523 - Multiplying only
• G06F 7/487 - MultiplyingDividing
• H03H 17/02 - Frequency-selective networks

Abstract

A method, applied in a driving circuit including a bidirectional circuit coupled between a voltage source and a load, includes receiving a feedback signal from the load and an input signal; generating a plurality of pulse width modulation (PWM) signals according to the input signal and the feedback signal; driving the load by the bidirectional circuit according to the plurality of PWM signals such that the input signal and the feedback signal are substantially proportional to each other. The input signal is a time varying signal. The step of generating a PWM signal among the plurality of PWM signals according to the input signal and the feedback signal includes determining a difference according to the input signal and the feedback signal; and generating the PWM signal with a pulse width. The pulse width is determined according to the difference.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 3/157 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 1/00 - Details of apparatus for conversion

Abstract

A digital-to-analog converter (DAC) includes a plurality of reference modules, an output capacitor configured to output the analog voltage, and a sharing switch coupled between the output capacitor and the reference modules. The reference modules are mutually connected in parallel. Each reference module includes a reference capacitor and a reference switch connected in series. A plurality of reference capacitances of the reference capacitors are substantially identical. The reference switches are controlled by a plurality of control signals. The control signals are corresponding to a control code. The DAC produces an analog voltage according to the control code. An analog difference, between a first analog voltage corresponding to a first control code and a second analog voltage corresponding to a second control code, monotonically increases or monotonically decreases as a first value corresponding to the first control code increases. The first control code is consecutive to the second control code.

IPC Classes  ?

• H03M 1/06 - Continuously compensating for, or preventing, undesired influence of physical parameters

Abstract

A bidirectional charging and discharging circuit is coupled between a voltage source and a capacitive load and configured to drive the capacitive load. The bidirectional charging and discharging circuit includes a first switch, comprising a first terminal coupled to the voltage source; a second switch, comprising a first terminal coupled to a second terminal of the first switch, and a second terminal coupled to a ground; an inductor, comprising a first terminal coupled to the second terminal of the first switch and the first terminal of the second switch; a third switch, comprising a first terminal coupled to a second terminal of the inductor, and a second terminal coupled to a first terminal of the capacitive load; and a fourth switch, comprising a first terminal coupled to the second terminal of the inductor and the first terminal of the third switch, and a second terminal coupled to a ground.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 3/155 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
• H04R 3/00 - Circuits for transducers
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers

Abstract

A crossover circuit, disposed within a sound producing device including a first sound producing cell driven by a first driving signal and a second sound producing cell driven by a second driving signal, includes a first filter receiving an input signal at an input terminal of the first filter, a first subtraction circuit, and a second filter coupled between the output terminal of the first filter and the second input terminal of the first subtraction circuit. A first input terminal of the first subtraction circuit is coupled to the input terminal of the first filter; a second input terminal of the first subtraction circuit is coupled to an output terminal of the first filter. The crossover circuit produces the first driving signal and the second driving signal according to a first output signal of the first subtraction circuit and a second output signal of the first filter respectively.

IPC Classes  ?

• H03G 5/00 - Tone control or bandwidth control in amplifiers
• H04R 3/14 - Cross-over networks
• H04R 3/04 - Circuits for transducers for correcting frequency response
• H04R 7/04 - Plane diaphragms
• H04R 1/10 - EarpiecesAttachments therefor
• B81B 3/00 - Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
• H04R 1/26 - Spatial arrangement of separate transducers responsive to two or more frequency ranges

Abstract

An acoustic transducer is disposed within a wearable sound device or to be disposed within the wearable sound device. The acoustic transducer includes a first anchor structure and a first flap. The first flap includes a first end and a second end. The first end is anchored by the first anchor structure, and the second end is configured to perform a first up-and-down movement to form a vent temporarily. The first flap partitions a space into a first volume to be connected to an ear canal and a second volume to be connected to an ambient of the wearable sound device. The ear canal and the ambient are connected via the vent temporarily opened.

IPC Classes  ?

• H04R 1/10 - EarpiecesAttachments therefor

Abstract

A sound producing package structure includes a plurality of chips disposed within a cavity. The chips includes a first chip and a second chip, the first chip includes a first sound producing membrane and a first actuator attached to the first sound producing membrane, and a second chip includes a second sound producing membrane and a second actuator attached to the second sound producing membrane. The first sound producing membrane and the second sound producing membrane are actuated toward a center of the cavity in a synchronous fashion so as to produce a sound pressure.

IPC Classes  ?

• B81B 7/00 - Microstructural systems
• B81C 1/00 - Manufacture or treatment of devices or systems in or on a substrate
• H04R 1/02 - CasingsCabinetsMountings therein
• H04R 7/06 - Plane diaphragms comprising a plurality of sections or layers
• H04R 7/16 - Mounting or tensioning of diaphragms or cones
• H04R 1/40 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
• H04R 19/01 - Electrostatic transducers characterised by the use of electrets
• H04R 19/04 - Microphones

Abstract

An acoustic transducer is configured to perform an acoustic transformation. The acoustic transducer is disposed within a wearable sound device or to be disposed within the wearable sound device. The acoustic transducer includes at least one anchor structure, a film structure and an actuator. The film structure is disposed within a first layer and anchored by the anchor structure disposed within a second layer. The actuator is disposed on the film structure, and the actuator is configured to actuate the film structure to form a vent temporarily. The film structure partitions a space into a first volume to be connected to an ear canal of a wearable sound device user and a second volume to be connected to an ambient of the wearable sound device. The ear canal and the ambient are to be connected via the vent temporarily opened when the film structure is actuated.

IPC Classes  ?

• H04R 1/10 - EarpiecesAttachments therefor

Abstract

An acoustic testing method includes providing an electrical signal to a wafer, receiving a sound wave generated by the acoustic transducer according to the electrical signal, and generating a sensing result for determining an acoustic functionality of the acoustic transducer. The wafer includes a plurality of acoustic transducers, and the electrical signal is provided to an acoustic transducer within the wafer.

IPC Classes  ?

• H04R 29/00 - Monitoring arrangementsTesting arrangements
• H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means

Abstract

A sound producing package structure configured to produce sound includes a substrate, a sound producing component and a conductive adhesive layer. The sound producing component is disposed on the substrate, and the sound producing component is configured to generate an acoustic wave corresponding to an input audio signal. The conductive adhesive layer is disposed between the substrate and the sound producing component by a surface mount technology.

IPC Classes  ?

• H04R 19/02 - Loudspeakers
• B81B 7/00 - Microstructural systems
• B81C 1/00 - Manufacture or treatment of devices or systems in or on a substrate
• H04R 1/02 - CasingsCabinetsMountings therein
• H04R 7/04 - Plane diaphragms
• H04R 7/18 - Mounting or tensioning of diaphragms or cones at the periphery
• H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Abstract

A sound producing package structure includes a shell and a chip. The shell includes a top structure, a bottom structure and a sidewall structure. The chip is disposed inside the shell and configured to produce an acoustic wave, wherein the chip includes a thin film structure and an actuator configured to actuate the thin film structure, and the thin film structure is substantially parallel to the top structure and the bottom structure. A first opening is formed on the sidewall structure, and the acoustic wave propagates outwards through the first opening.

IPC Classes  ?

• H04R 1/02 - CasingsCabinetsMountings therein
• H04R 3/00 - Circuits for transducers
• H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
• H04R 7/04 - Plane diaphragms

Abstract

A package structure includes a housing and a sound producing chip. The sound producing chip is disposed within the housing. The sound producing chip includes a membrane and an actuator. The membrane includes a coupling plate and a spring structure connected to the coupling plate. The actuator is configured to receive a driving signal to actuate the membrane. The spring structure is situated between the coupling plate and the actuator. The coupling plate is actuated to move by the actuator via the spring structure.

IPC Classes  ?

• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers
• H04R 3/00 - Circuits for transducers
• H04R 31/00 - Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
• H04R 7/18 - Mounting or tensioning of diaphragms or cones at the periphery
• H04R 7/04 - Plane diaphragms
• H04R 1/02 - CasingsCabinetsMountings therein

Abstract

A system, disposed within a wearable hearing device, includes a sound producing device (SPD) driven by a driving voltage, a first sound sensing device, and a subtraction circuit. The first sound sensing device is configured to sense a combined sound pressure produced at least by the SPD and generate a sensed signal accordingly. The subtraction circuit has a first input terminal, a second input terminal, and a first output terminal. The first input terminal is coupled to the first sound sensing device, and the first output terminal is coupled to the SPD. A first phase delay between the driving voltage and the sensed signal is less than 60°.

IPC Classes  ?

• H04R 1/10 - EarpiecesAttachments therefor

Abstract

A sound producing device includes a first sound producing cell, driven by a first driving signal and configured to produce a first acoustic sound on a first audio band, and a second sound producing cell, driven by a second driving signal and configured to produce a second acoustic sound on a second audio band different from the first audio band. A first membrane of the first sound producing cell and a second membrane of the second sound producing cell are Micro Electro Mechanical System fabricated membranes. The first audio band is upper bounded by a first maximum frequency; the second audio band is upper bounded by a second maximum frequency. A first resonance frequency of the first membrane is higher than the first maximum frequency of the first driving signal. A second resonance frequency of the second membrane is higher than the second maximum frequency of the second driving signal.

IPC Classes  ?

• A61F 11/06 - Protective devices for the ears
• G10K 11/16 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
• H03B 29/00 - Generation of noise currents and voltages
• H04R 3/14 - Cross-over networks
• H04R 19/02 - Loudspeakers
• H04R 7/04 - Plane diaphragms
• G10K 11/178 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effectsMasking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
• H04R 1/10 - EarpiecesAttachments therefor
• B81B 3/00 - Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
• H04R 1/26 - Spatial arrangement of separate transducers responsive to two or more frequency ranges

Abstract

A sound producing device is provided. The sound producing device comprises a substrate; and a membrane pair, disposed on the substrate, comprising a first membrane and a second membrane; wherein when a driving voltage is applied on the membrane pair, the first membrane and the second membrane deform toward each other, such that air between the first membrane and the second membrane is squeezed outward and an air pulse is generated toward a direction away from the substrate.

IPC Classes  ?

• H04R 17/10 - Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
• H04R 19/02 - Loudspeakers
• H04R 1/24 - Structural combinations of separate transducers or of parts of the same transducer and responsive respectively to two or more frequency ranges

Abstract

A driving circuit is disclosed. The driving circuit includes a first node, coupled to at least a first air pulse generating element, wherein the driving circuit produces a first driving signal to the at least a first air pulse generating element via the first node; a second node, coupled to at least a second air pulse generating element, wherein the driving circuit produces a second driving signal to the at least a second air pulse generating element via the second node; a first swapping module, coupled to the first node and the second node, configured to be conducted within a first conduction interval; wherein a first voltage level at the first node and a second voltage level at the second node are substantially swapped after the first conduction interval.

IPC Classes  ?

• H04R 25/00 - Deaf-aid sets
• H04R 1/02 - CasingsCabinetsMountings therein

Abstract

A sound producing device includes a base and at least one chip disposed on the base. The chip includes at least one membrane and at least one actuator. The membrane includes a coupling plate and at least one spring structure connected to the coupling plate. The actuator is configured to receive a driving signal corresponding to an input audio signal to actuate the membrane, and the input audio signal and the driving signal have an input audio band which has an upper bound at a maximum frequency. The spring structure is situated between the coupling plate and the actuator. The membrane has a first resonance frequency higher than the maximum frequency.

IPC Classes  ?

• H04R 19/02 - Loudspeakers

Abstract

A sound producing device is disclosed. The sound producing device includes a first air pulse generating element, driven by a first driving signal comprising a first electrical pulse, the first electrical pulse comprises a first transition edge with a first transition polarity; and a second air pulse generating element, disposed adjacent to the first air pulse generating element, driven by a second driving signal comprising a second electrical pulse, the second electrical pulse comprises a second transition edge with a second transition polarity; wherein the first transition polarity is opposite to the second transition polarity; wherein the first transition edge generally coincides with the second transition edge; wherein air pulses generated by the first or the second air pulse generating element produce non-zero offset in terms of sound pressure level.

IPC Classes  ?

• H04R 7/08 - Plane diaphragms comprising a plurality of sections or layers comprising superposed layers separated by air or other fluid
• H04R 19/00 - Electrostatic transducers

Abstract

An air pulse generating element is disclosed. The air pulse generating element includes a membrane, actuated according to a driving signal; a plate, wherein a chamber is formed between the plate and the membrane; wherein during a first phase of the driving signal, the membrane is actuated to change a volume within the chamber to generate an air pulse; wherein during a second phase of the driving signal, the membrane is actuated such that a gap is temporarily formed; wherein the temporarily formed gap is configured to provide a temporary air shunt to accelerate an air balancing process between a first air pressure at a first side of the membrane and a second air pressure at a second side of the membrane.

IPC Classes  ?

• G10K 9/00 - Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
• H04R 1/02 - CasingsCabinetsMountings therein
• G10K 9/12 - Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
• H04R 1/24 - Structural combinations of separate transducers or of parts of the same transducer and responsive respectively to two or more frequency ranges
• H04R 3/04 - Circuits for transducers for correcting frequency response

Abstract

A driving circuit is disclosed. The driving circuit includes a charging circuit, coupled between a voltage source and a load, configured to form a first current from the voltage source to the load; and a discharging circuit, coupled between the voltage source and the load, configured to form a second current from the load back to the voltage source.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 3/155 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A method applied in a driving circuit is disclosed. The driving circuit is coupled between a voltage source and a load and configured to drive the load. The method includes: forming, by the driving circuit, a first current from the voltage source to the load; and forming, by the driving circuit, a second current from the load back to the voltage source.

IPC Classes  ?

• H03F 3/38 - DC amplifiers with modulator at input and demodulator at outputModulators or demodulators specially adapted for use in such amplifiers
• H03F 3/70 - Charge amplifiers
• H03F 3/217 - Class D power amplifiersSwitching amplifiers
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers

Abstract

An audio device includes an electroacoustic convertor and a differential amplifier. The electroacoustic convertor has a first output terminal and a second output terminal. A first polarity of a first capacitance variation corresponding to the first output terminal is opposite to a second polarity of a second capacitance variation corresponding to the second output terminal. The first capacitance variation and the second capacitance variation are associated with a magnitude of acoustic pressure. The differential amplifier has a first input terminal coupled to the first output terminal and a second input terminal coupled to the second output terminal.

IPC Classes  ?

• H04R 29/00 - Monitoring arrangementsTesting arrangements
• H04R 3/00 - Circuits for transducers
• H04R 19/02 - Loudspeakers
• H03F 3/45 - Differential amplifiers

Abstract

A sound producing device includes at least one air pulse generating element. Each of the at least one air pulse generating element includes a membrane, a first air chamber and at least one opening, wherein a chamber pressure exists in the first air chamber. The membrane is actuated to change the chamber pressure of the first air chamber to generate a plurality of air pulses, the air pulses are propagated through the at least one opening, the air pulses produce a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a pressure value of an ambient pressure outside the sound producing device.

IPC Classes  ?

• H04R 7/04 - Plane diaphragms
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers
• H04R 19/02 - Loudspeakers
• H04R 1/02 - CasingsCabinetsMountings therein
• H04R 19/00 - Electrostatic transducers
• H04R 19/04 - Microphones

Abstract

An audio apparatus includes a sound sensing device, a first amplifier and a sound producing device. The sound sensing device configured to detect an ambient sound pressure. The first amplifier coupled to the sound sensing device is configured to convert a first signal corresponding to the ambient sound pressure into a second signal with inverted polarity of the first signal. The sound producing device is coupled to the first amplifier and configured to produce a counter sound pressure corresponding to the second signal. Overall phase delay from the ambient sound pressure to the counter sound pressure is less than 25 degrees.

IPC Classes  ?

• G10K 11/178 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effectsMasking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
• H04R 19/04 - Microphones
• H04R 17/02 - Microphones
• H03F 3/181 - Low-frequency amplifiers, e.g. audio preamplifiers

Abstract

A sound producing device (SPD) is provided. The SPD comprises a membrane, having a resonance frequency and a resonance bandwidth; and an actuator, disposed on the membrane, receiving a driving signal corresponding to an input audio signal; wherein the input audio signal has an input audio band which is upper bounded by a maximum frequency; wherein the resonance frequency is higher than the maximum frequency plus a half of the resonance bandwidth.

IPC Classes  ?

• H04R 29/00 - Monitoring arrangementsTesting arrangements
• H04R 3/00 - Circuits for transducers
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers
• H04R 19/02 - Loudspeakers

Abstract

A sound producing device includes at least one air pulse generating element. Each of the at least one air pulse generating element includes a membrane, a first air chamber and at least one opening, wherein a chamber pressure exists in the first air chamber, and the opening is connected between the first air chamber and an ambient surrounding the sound producing device. The membrane is actuated to change the chamber pressure of the first air chamber to generate a plurality of air pulses, the air pulses are propagated through the at least one opening, the air pulses produce a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a pressure value of an ambient pressure outside the sound producing device.

IPC Classes  ?

• H04R 23/00 - Transducers other than those covered by groups
• G10K 9/02 - Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas, e.g. suction operated
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers
• H04R 1/02 - CasingsCabinetsMountings therein

Abstract

A sound producing device includes at least one air pulse generating element. Each of the at least one air pulse generating element includes a membrane, a first air chamber and at least one opening, wherein a chamber pressure exists in the first air chamber. The membrane is actuated to change the chamber pressure of the first air chamber to generate a plurality of air pulses, the air pulses are propagated through the at least one opening, the air pulses produce a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a pressure value of an ambient pressure outside the sound producing device. Each pulse cycle has a pulse-generating time segment and a pulse-isolating time segment, the driving signal during the pulse-generating time segment is different from the driving signal during the pulse-isolating time segment.

IPC Classes  ?

• H04R 9/06 - Loudspeakers
• H04R 9/04 - Construction, mounting, or centering of coil
• H03K 5/156 - Arrangements in which a continuous pulse train is transformed into a train having a desired pattern
• H03K 5/13 - Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals

Abstract

A sound producing device is provided. The sound producing device includes a membrane, disposed within a chamber, controlled by a membrane control signal to cause a membrane movement; and a first deflector, disposed within a first opening by the membrane, controlled by a first deflector control signal to cause a first deflector rotation; wherein the sound producing device produces a plurality of air pulses via the membrane movement and the first deflector rotation, the plurality of air pulses has an air pulse rate, the air pulse rate is higher than a maximum human audible frequency; wherein the plurality of air pulses produces a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a zero sound pressure level.

IPC Classes  ?

• H04R 7/02 - Diaphragms for electromechanical transducersCones characterised by the construction
• H04R 9/04 - Construction, mounting, or centering of coil
• H04R 3/00 - Circuits for transducers
• H04R 1/06 - Arranging circuit leadsRelieving strain on circuit leads

Abstract

A sound producing apparatus is provided. The sound producing apparatus includes a driving circuit, configured to generate a driving signal according to an input audio signal; and a sound producing device; wherein the sound producing device is driven by the driving signal, such that the sound producing device produces a plurality of air pulses at an air pulse rate, the air pulse rate is higher than a maximum human audible frequency; wherein the plurality of air pulses produces a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a zero sound pressure level; wherein the driving signal driving the sound producing device to produce the plurality of air pulses, is unipolar with respect to a first voltage.

IPC Classes  ?

• H04R 3/00 - Circuits for transducers
• H03F 3/20 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
• H03F 1/02 - Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
• H04R 7/04 - Plane diaphragms
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers

Abstract

A sound producing apparatus is provided. The sound producing apparatus includes a sound producing device disposed at a sound producing location and configured to produce a plurality of air pulses according to a driving signal; a driving circuit, receiving an input audio signal and a channel-shaping signal and configured to generate the driving signal according to the input audio signal and the channel-shaping signal, wherein the channel-shaping signal is related to a channel impulse response of a channel between the sound producing location and a sound constructing location; a signal processing circuit, configured to generate the channel-shaping signal according to the channel impulse response.

IPC Classes  ?

• H04S 7/00 - Indicating arrangementsControl arrangements, e.g. balance control
• H04R 5/02 - Spatial or constructional arrangements of loudspeakers
• H04R 1/34 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
• H04S 3/00 - Systems employing more than two channels, e.g. quadraphonic
• H04R 5/04 - Circuit arrangements

Abstract

A sounding system is provided. The sounding system comprising a sound producing device, disposed at a sound producing location, receiving a sounding sequence, configured to produce a sounding pulse array according to the sounding sequence; and a sounding circuit, comprising a sensor, disposed at a sound constructing location, receiving a received sounding pulse array corresponding to the sounding pulse array; a filtering circuit, configured to perform a filtering operation on the received sounding pulse array according to the sounding sequence and the sounding pulse waveform, and generate an overall filtering result; and a spike detection circuit, configured to perform a spike detection operation on the overall filtering result and obtain a channel impulse response corresponding to a channel between the sound producing location and the sound constructing location.

IPC Classes  ?

• H04S 7/00 - Indicating arrangementsControl arrangements, e.g. balance control
• H04R 1/40 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
• H04R 3/12 - Circuits for transducers for distributing signals to two or more loudspeakers
• H04R 5/02 - Spatial or constructional arrangements of loudspeakers
• H04S 3/00 - Systems employing more than two channels, e.g. quadraphonic
• H04R 3/04 - Circuits for transducers for correcting frequency response

Abstract

A method for manufacturing an air pulse generating element is provided. First, a thin film layer including a membrane is provided, and then, a plurality of actuators are formed on the thin film layer. After that, a first chamber is formed between the thin film layer and a first plate and followed by patterning the thin film layer to form a plurality of valves, in which the membrane and the valves are formed of the thin film layer. Subsequently, a second chamber is formed between the thin film layer and a second plate, and a plurality of channels are formed in the first plate and the second plate.

IPC Classes  ?

• H04R 1/32 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers
• H04R 19/00 - Electrostatic transducers
• H04R 19/02 - Loudspeakers
• H04R 9/06 - Loudspeakers
• G10K 9/12 - Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated

Abstract

A sound producing device includes an air pulse generating element and a control unit. The air pulse generating element includes an air chamber, a membrane, a first air entrance and a first valve. The membrane is disposed in the air chamber. The first air entrance is disposed at a side of the membrane in a first direction. The first valve is disposed between the first air entrance and the membrane. The control unit generates a driving signal to control a movement of the membrane, such that the air pulse generating element generates an air pulse in response to the driving signal. During an operation, an first airflow corresponding to the air pulse flows into or flows out of the air chamber through the first air entrance, and passes through the first air entrance substantially along a direction parallel to the first direction perpendicular to the moving direction of the membrane.

IPC Classes  ?

• H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
• F16K 11/10 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with two or more closure members not moving as a unit

Abstract

A sound producing apparatus is provided. The sound producing apparatus comprises a driving circuit, comprising a pulse amplitude modulation (PAM) module, configured to generate an driving signal according to an audio input signal, wherein the driving signal comprises a pulse amplitude modulated signal generated according to the audio input signal, the pulse amplitude modulated signal comprises a plurality of pulses at a pulse rate, two consecutive pulses among the plurality of pulses are temporally spaced by a pulse cycle, the pulse rate is a reciprocal of the pulse cycle, and the pulse rate is larger than a maximum audible frequency; and a sound producing device, coupled to the driving circuit, configured to produce sound according to the driving signal.

IPC Classes  ?

• H04R 19/02 - Loudspeakers
• H04R 7/04 - Plane diaphragms
• H04R 3/04 - Circuits for transducers for correcting frequency response
• G10K 9/13 - Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means

Abstract

A sound producing apparatus is provided. The sound producing apparatus comprises a driving circuit, comprising a pulse amplitude modulation (PAM) module, configured to generate an driving signal according to an audio input signal, wherein the driving signal comprises a pulse amplitude modulated signal generated according to the audio input signal, the pulse amplitude modulated signal comprises a plurality of pulses at a pulse rate, two consecutive pulses among the plurality of pulses are temporally spaced by a pulse cycle, the pulse rate is a reciprocal of the pulse cycle, and the pulse rate is larger than a maximum audible frequency; and a sound producing device, coupled to the driving circuit, configured to produce sound according to the driving signal.

IPC Classes  ?

• H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
• H04R 1/24 - Structural combinations of separate transducers or of parts of the same transducer and responsive respectively to two or more frequency ranges
• H04R 9/06 - Loudspeakers

Abstract

A sound producing apparatus is provided. The sound producing apparatus comprises a driving circuit, comprising a pulse amplitude modulation (PAM) module, configured to generate an driving signal according to an audio input signal, wherein the driving signal comprises a pulse amplitude modulated signal generated according to the audio input signal, the pulse amplitude modulated signal comprises a plurality of pulses at a pulse rate, two consecutive pulses among the plurality of pulses are temporally spaced by a pulse cycle, the pulse rate is a reciprocal of the pulse cycle, and the pulse rate is larger than a maximum audible frequency; and a sound producing device, coupled to the driving circuit, configured to produce sound according to the driving signal.

IPC Classes  ?

• H04R 3/00 - Circuits for transducers
• H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
• H04R 1/24 - Structural combinations of separate transducers or of parts of the same transducer and responsive respectively to two or more frequency ranges
• H04R 9/06 - Loudspeakers
• H04R 3/08 - Circuits for transducers for correcting frequency response of electromagnetic transducers
• H04R 3/04 - Circuits for transducers for correcting frequency response

Abstract

The present invention provides a sound producing device comprising: an air pulse generating element and a control unit. The air pulse generating element comprises an air chamber and an actuator. The control unit, configured to generate a driving voltage applied to the actuator of the air pulse generating element, such that the air pulse generating element generates a plurality of air pulses in response to the driving voltage. The plurality of air pulses are at a pulse rate, and the pulse rate of the plurality of air pulses is higher than a maximum audible frequency.

IPC Classes  ?

• H04R 3/04 - Circuits for transducers for correcting frequency response
• H04R 1/02 - CasingsCabinetsMountings therein
• H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
• H04R 3/12 - Circuits for transducers for distributing signals to two or more loudspeakers
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers
• H04R 1/24 - Structural combinations of separate transducers or of parts of the same transducer and responsive respectively to two or more frequency ranges
• G10K 9/12 - Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
• H04R 19/00 - Electrostatic transducers

Abstract

The present invention provides a sound producing device comprising: an air pulse generating element and a control unit. The air pulse generating element comprises an air chamber and an actuator. The control unit, configured to generate a driving voltage applied to the actuator of the air pulse generating element, such that the air pulse generating element generates a plurality of air pulses in response to the driving voltage. The plurality of air pulses are at a pulse rate, and the pulse rate of the plurality of air pulses is higher than a maximum audible frequency.

IPC Classes  ?

• H04R 3/04 - Circuits for transducers for correcting frequency response
• H04R 1/02 - CasingsCabinetsMountings therein
• H04R 17/00 - Piezoelectric transducersElectrostrictive transducers
• H04R 19/00 - Electrostatic transducers