The invention relates to an antenna system for electromagnetic waves in a microwave range. At least one directional antenna such as a Vivaldi antenna and/or an omnidirectional antenna such as a dipole antenna, with at least one central unit including at least one active member which is connectible with at least one reception/transmission system is disclosed. To make the system more flexible, the plugged-in antenna is capacitively coupled to at least one motherboard of the central unit and a booster module, an attenuation module, a calibration module, a combiner module, a filter module, or a passive module is optionally pluggable in the central unit to provide a pluggable module. The functionality of the central unit is determined based on the plugged-in module.
H01Q 13/08 - Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
H01Q 1/08 - Means for collapsing antennas or parts thereof
H01Q 23/00 - Antennas with active circuits or circuit elements integrated within them or attached to them
H04B 1/18 - Input circuits, e.g. for coupling to an antenna or a transmission line
H01Q 19/30 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
H01Q 21/20 - Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along, or adjacent to, a curvilinear path
H01Q 3/44 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element
H01Q 7/00 - Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
H01Q 13/18 - Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity
H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
H01Q 9/28 - Conical, cylindrical, cage, strip, gauze or like elements having an extended radiating surface Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
Directional coupler (1), comprising at least two coupled lines (2,3) and at least three ports (P1, P2, P3), the first coupled line (1) having at least two ports, an input port (P1) and an output port (P2), the second coupled line (3) having a forward path (4) and a backward path (5) joined together at a third port, the coupled port (P3), and forming a loop. In order to achieve a constant coupling attenuation over a broad frequency band and to minimize the dimensions the second coupled line (3) has a higher line impedance than the first coupled line (2), at least two times higher, and a coupling resistor (6) is connected in series either in the forward path (4) or in the backward path (5). In a multichannel power splitter such directional couplers (1) are connected in series.
H01P 5/18 - Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
The present invention relates to a drip control device for a boom microphone for installation around the boom at a distance from the microphone. To improve the dripping off beads of perspiration, the drip control device as measured in the direction of the boom, has a length (L) and as measured in the direction perpendicular to the boom, a length (D) and that with respect to ratio of these dimensions, such a ratio L/D is greater than 1.
The disclosed active noise suppression headphone system is directed to a headphone system that is capable of substantially suppressing high or low frequency interfering noise that penetrate through a headphone earpiece from multiple directions. An external microphone mounted with a housing of a headphone earpiece senses ambient noise outside of the earpiece. The sensed ambient noise may be processed through at least one parallel filter bank arranged in at least one headphone earpiece. Each parallel filter bank may include adaptively linked filters. The output of these filters may be amplified based on weighting factors that are dependent upon the sensed ambient noise and that are generated by a filtered x least mean square circuit. The amplified filtered outputs may be summed to generate an antinoise signal that is in input to a loudspeaker within the headphone earpiece that substantial suppresses the ambient noise before it can be perceived by an end user of the headphones.
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
G10L 19/00 - Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocodersCoding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
G10L 19/005 - Correction of errors induced by the transmission channel, if related to the coding algorithm
G10L 19/032 - Quantisation or dequantisation of spectral components
09 - Scientific and electric apparatus and instruments
Goods & Services
Apparatus for recording, transmission and reproduction of sound and images; physical, acoustic, optical, electro-technical, signalling, measuring, monitoring, photographic, cinematographic, radio, and electroacoustic apparatus; microphones; headphones; loudspeakers; electroacoustic transducers; sound reverberation units; amplifiers; voice machines, namely, electroacoustic transducers, reproducing headphones, and structural parts for the above; wireless headphones; electronic transmitter stations for wireless headphones; intercom comprised of microphone and headphone; amplifiers; acoustic pick up, recording, transmission and reproduction apparatus; reverberation and delay apparatus, namely, sound reverberation units; in ear monitors not for medical purposes; wireless microphones; infrared sending apparatus, namely, infrared microphone and headphone transmitters; infrared receivers for microphones and headphones; infrared battery chargers for microphones and headphones; handheld microphone and headphone transmitter; pocket microphone and headphone transmitter; stationary receivers for microphones and headphones; pocket receivers for microphones and headphones; wireless headphones and wireless receivers for audio and video signals; transmission and receiving apparatus and installations, namely, ultrasound converters; accessories for ultrasound converters, namely, ultrasonic electroacoustic transducer units; studio apparatus, namely, vibration meters; acoustic positioning, locating and distance measuring apparatus; frequency scanners for wireless frequency; measuring apparatus and complete measuring stations for acoustic testing, namely, electroacoustic transducers, amplifiers, and structural parts for the above; sound frequency generators; stereophonic apparatus, namely, ultrasonic electroacoustic transducer units; projection apparatus, namely, headphones, loudspeakers and electroacoustic transducers; projection screens; stereo and colour film apparatus and components and accessories therefor, namely, headphones, loudspeakers, electroacoustic transducers, reproducing headphones, amplifiers; acoustic component parts, namely, microphones, electroacoustic transducers, transformers for sound recording and reproduction, transformers with built-in amplifiers and voice controls; Accessories for headphones and microphones; accessories for headphones and microphones, namely, jacks, cables, audio jack adapters, pads for headphones, replacement tips for earbuds, splitter cables, power cables, chargers, charging docks, microphone stands; replacement structural parts for the all of aforesaid goods, individual structural parts for all of the aforesaid goods.
The invention concerns an antenna system of a radio microphone that includes an antenna path starting at an in port and ending at an out port along with an amplifier and a radio frequency (RF) cable. In order to compensate for various cable attenuations, an attenuator is provided in series with a variable slope compensator between the amplifier and the RF cable. In order to avoid a negative effect on a large signal behavior of variable slope compensators, field effect transistors (FETs) or pin diodes are used for switching of the resistances so that a large signal behavior is achieved.
The invention relates to a plug earphone with a front portion and a rear portion, wherein a flexible plug can be placed on the front portion which includes an outer portion and an inner portion. An electroacoustic transducer is arranged in the rear portion, wherein the front portion is positioned on the electroacoustic transducer and on an opening of the rear portion produced in this area. To achieve a reliable acoustic friction piece which is easy to manufacture, the front portion, and optionally an inner portion and an outer portion, together with a front wall of the rear portion, forms at least one radial channel leading from the interior of the front portion to the outside, and an acoustic friction piece is optionally arranged in the radial channel.
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
An earphone is provided that can decrease a time delay between a microphone and a loudspeaker. The earphone includes a microphone incorporated with the membrane of loudspeaker. The loudspeaker and the microphone are connected by connection lines to an electronic circuit.
A microphone filter system for outputting an audio signal independent of electrical impedance of downstream devices. This system may include a filter section and an audio transformer that facilitate the outputting of the audio signal.
A noise reducing sound reproduction system and method is disclosed, in which an input signal is supplied to a loudspeaker by which it is acoustically radiated. The signal radiated by the loudspeaker is received by a microphone that is acoustically coupled to the loudspeaker via a secondary path and that provides a microphone output signal. The microphone output signal may be subtracted from a useful-signal to generate a filter input signal. The filter input signal may be filtered in an active noise reduction filter to generate an error signal. The useful-signal may be subtracted from the error signal to generate the loudspeaker input signal, and the useful-signal may be filtered by one or more low-pass filters prior to subtraction from the microphone output signal.
H04B 15/00 - Suppression or limitation of noise or interference
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
A system for receiving digital audio data may include a diversity-receiving unit. The diversity-receiving unit may include at least two antennas and at least one receiving channel, which can be switched from one antenna to another antenna. To reduce audible disturbances in the receiving channel, a dropout concealment may be carried out when disturbances in the received audio signal occur. The dropout concealment may use intact audio signal parts before the disturbance and/or after the disturbance to synthesize the concealment signal. The receiving channel may be switched to another antenna as a function of whether the dropout concealment is activated.
An earphone device converts electric signals to audible sound. The earphone includes a first electroacoustic transducer and a second electroacoustic transducer. A separating part of the earphone is positioned between the second transducer and a sound opening of a plug area of the earphone. The separating part forms a barrier between a first sound path for the first transducer and a second sound path for the second transducer. The first sound path comprises a substantially annular cross-section disposed around the second sound path. The earphone includes a filter disk arranged in the sound opening, in which an acoustic friction is provided for each of the first and second sound paths.
The invention pertains to a method for receiving digital audio data with a diversity-receiving unit, which has at least two antennas and at least one receiving channel, which can be switched from one antenna to another antenna. To reduce audible disturbances in the receiving channel, a dropout concealment is carried out when disturbances in the received audio signal occur, in which case the dropout concealment uses intact audio signal parts before the disturbance and/or after the disturbance to synthesize the concealment signal, and that the receiving channel is switched to another antenna as a function of whether the dropout concealment is activated.
H04B 7/08 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
The system converts an analog input signal into a digital output signal while avoiding interference, such as clipping. The system derives two signal components having differing signal magnitude levels from the analog input signal. The signal components are subjected to independent analog to digital conversion, such as through low resolution analog to digital converters. The system determines weighting factors for the two signal components based on at least one property of at least one of the signal components, such as the level of at least one of the signal components. The signal components are weighted. The weighted signal components are merged.
The invention relates to headphones (10) with at least one ear cup (11), which has at least one operating element for the regulation of an audio function. To facilitate the regulation for the user, the operating element comprises a rotary, annular handle (15), and the area of the ear cup (11) that is accessible from outside and enclosed by the annular handle (15) is uncoupled mechanically from the rotary motion of the handle (15), and in that a disk (1) located inside the annular handle (15) is designed to be shiftable and/or tiltable, to take over additional control functions for at least another audio function.
A diversity receiving device includes two signal paths. Each path interfaces an antenna that receives a radio frequency signal and an amplifier that amplifies the received radio frequency signal. A variable signal level attenuator in each path attenuates the amplified signal and receives current from current sources. The current sources are coupled to the amplifiers through variable signal level attenuators. The variable signal level attenuators are in parallel with controllable bypass lines which comprise variable resistance elements. The two signal paths are combined into a common path.
A method conceals dropouts in one or more audio channels of a multi-channel arrangement. The method maps transmitted signals into a frequency domain during an error-free signal transmission of two or more channels. A magnitude spectra and spectral filter coefficients are derived. The spectral filter coefficients relate the magnitude spectrum of the audio channel to the magnitude spectrum of at least one other channel. When a dropout occurs, a replacement signal is generated through the filter coefficients and a substitution signal. The filter coefficients may be generated prior to the detection of the dropout.
G10L 19/02 - Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocodersCoding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
The invention refers to a transducer assembly comprising a first electroacoustic transducer (1) and at least one additional electroacoustic transducer (2), with each of the transducers comprising an electrode (10, 20) and a counter electrode. To achieve greater coincidence, an outer diaphragm section (11), which is limited by an outer circumference (12) and by an inner circumference (13) lying within the outer circumference (12), forms the counter electrode of the first electroacoustic transducer (1) and an inner diaphragm section (21), which lies within the inner circumference of the outer diaphragm section (11), forms the counter electrode of the other electroacoustic transducer (2).
H04R 19/01 - Electrostatic transducers characterised by the use of electrets
H04R 1/24 - Structural combinations of separate transducers or of parts of the same transducer and responsive respectively to two or more frequency ranges
A transducer assembly includes a first electroacoustic transducer and a second electroacoustic transducer. The first and the second electrostatic transducers include an electrode and a counter electrode. An inner circumference of an outer diaphragm section lying within an outer circumference forms the counter electrode of the first electroacoustic transducer. An inner diaphragm section that lies within the inner circumference of the outer diaphragm section forms the counter electrode of the second electroacoustic transducer.
A microphone arrangement includes multiple pressure gradient transducers having an acoustic center, a first sound inlet opening leading to a front of a diaphragm, and a second sound inlet opening leading the back of the diaphragm. A directional characteristic of the pressure gradient transducers includes an omni portion and a figure-eight portion. The pressure gradient transducers have a direction of maximum sensitivity in a main direction. Each main direction of the pressure gradient transducers is inclined. The acoustic center of a pressure transducer and the pressure gradient transducers are positioned within an imaginary sphere having a radius that corresponds to double the largest dimension of the diaphragm of one of the transducers.
The invention relates to a Microphone arrangement, having at least two pressure gradient transducers (1, 2), each with a diaphragm, with each pressure gradient transducer (1, 2) having a first sound inlet opening (1a, 2a), which leads to the front of the diaphragm, and a second sound inlet opening (1b, 2b) which leads to the back of the diaphragm, and in which the directional characteristic of each pressure gradient transducer (1, 2) has a direction of maximum sensitivity, the main direction, and in which the main directions (1c, 2c) of the pressure gradient transducers (1, 2) are inclined relative to each other. The invention is characterized in that the microphone arrangement has at least one pressure transducer (5) with the acoustic centers (101, 201, 501) of the pressure gradient transducers (1, 2) and the pressure transducer (5) lying within an imaginary sphere (O) whose radius (R) corresponds to the double of the largest dimension (D) of the diaphragm of a transducer (1, 2, 5).
H04R 1/38 - 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 in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
H04R 1/40 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
34.
MICROPHONE ARRANGEMENT COMPRISING THREE PRESSURE GRADIENT TRANSDUCERS
The invention pertains to a microphone arrangement consisting of three pressure gradient transducers (1, 2, 3), each with a diaphragm and a housing, with each pressure gradient transducer (1, 2, 3) having a first sound inlet opening (1a, 2a, 3a), which leads to the front of the diaphragm, and a second sound inlet opening (1b, 2b, 3b), which leads to the back of the diaphragm, and in which the directional characteristic of each pressure gradient transducer (1, 2, 3) contains an omni portion and a figure-of-eight portion as well as a direction of maximum sensitivity, in the main direction, and in which the main directions of the pressure gradient transducers (1, 2) are inclined relative to each other. In order to be able to produce a B-format, the acoustic centers of the three pressure gradient transducers (1, 2, 3) lie within an imaginary sphere whose radius corresponds to the double of the largest dimension of the diaphragm of a pressure gradient transducer (1, 2, 3), with the projections of the main directions of the three pressure gradient transducers forming angles with each other, whose values lie between 110° and 130° in a base plane spanned by the first sound inlet openings (1a, 2a, 3a) of the three pressure gradient transducers (1, 2, 3 ).
H04R 1/38 - 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 in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
H04R 1/40 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
35.
MICROPHONE ARRANGEMENT, HAVING TWO PRESSURE GRADIENT TRANSDUCERS
The invention relates to a microphone arrangement, having two pressure gradient transducers (1, 2), each with a diaphragm, with each pressure gradient transducer (1, 2) having a first sound inlet opening (1a, 2a), which leads to the front of the diaphragm, and a second sound inlet opening (1b, 2b) which leads to the back of the diaphragm, and in which the directional characteristic of each pressure gradient transducer (1, 2) comprises an orrmi portion and a figure-of-eight portion and has a direction of maximum sensitivity, the main direction, and in which the main directions (1c, 2c) of the pressure gradient transducers (1, 2) are inclined relative to each other. In order to be able to produce a B-format, the microphone arrangement has a pressure transducer (3) with the acoustic centers of the pressure gradient transducers (1, 2) and the pressure transducer (3) lying within an imaginary sphere whose radius corresponds to the double of the largest dimension of the diaphragm of a transducer (1, 2, 3).
H04R 1/38 - 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 in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
H04R 1/40 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
The invention relates to a method for synthesizing a microphone signal from a coincident microphone arrangement, consisting of at least two pressure gradient transducers (1, 2), whose directional characteristic consists of an omni portion and a figure-of-eight portion, and which has a direction of maximum sensitivity, the main direction, with the main directions of the pressure gradient transducers (1, 2) being inclined relative to each other. In order to record a useful sound direction with high quality, starting from the Signals of two pressure gradient transducers (1, 2), a difference signal (f1 - f2) and a sum signal (f1 + f2) are formed, Signals (s1, s2) derived from the difference signal (f1 - f2) and the sum signal (f1 + f2) are transformed into the frequency ränge (S1(쳱), S2(쳱)) and subtracted from each other, independently of their phases, by spectral subtraction (40), and the forming signal is then provided with the phase (൘1(쳱)) of the signal (S1(쳱)) originating from the sum signal (f1 + f2) before it is back-transformed into the desired time range.
H04R 1/38 - 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 in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
H04R 1/40 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
The invention relates to a microphone arrangement, having at least three pressure gradient transducers (1, 2, 3), each with a diaphragm, with each pressure gradient transducer (1, 2, 3) having a first sound inlet opening (1a, 2a, 3a), which leads to the front of the diaphragm, and a second sound inlet opening (1b, 2b, 3b) which leads to the back of the diaphragm, and in which the directional characteristic of each pressure gradient transducer (1, 2, 3) comprises a omni portion and a figure-of-eight portion and has a direction of maximum sensitivity, the main direction, and in which the main directions (1c, 2c) of the pressure gradient transducers (1, 2) are inclined relative to each other. The invention is characterized by the fact that the microphone arrangement has at least one pressure transducer (5) with the acoustic centers (101, 201, 301, 501) of the pressure gradient transducers (1, 2, 3) and the pressure transducer (5) lying within an imaginary sphere (O) whose radius (R) corresponds to the double of the largest dimension (D) of the diaphragm of a transducer (1, 2, 3, 5).
H04R 1/38 - 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 in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
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 3/02 - Circuits for transducers for preventing acoustic reaction
38.
METHOD AND DEVICE FOR LOW-LATENCY AUDITORY MODEL-BASED SINGLE-CHANNEL SPEECH ENHANCEMENT
The present invention relates to a method for enhancing wide-band speech audio signals in the presence of background noise and, more particularly to a noise suppression system, a noise suppression method and a noise suppression program. More specifically, the present invention relates to low-latency single-channel noise reduction using sub-band processing based on masking properties of the human auditory system.
An audio compressor may regulate the level of an audio input signal depending on whether the level is above or below a threshold value. The audio compressor may control a pumping that is created when regulating a dynamic range of an audio signal with the threshold value. A feedback loop connecting the signal output from the audio compressor with a release filter may be used to modify an effective release time of the signal. A controller may be used that allows a filter coefficient of the release filter to be controlled to adjust the effective release time as a function of the signal output.
The invention relates to a diversity receiving device having at least two signal paths (10, 20) each of them comprising an antenna (11, 21) for receiving a radio signal, an amplifier (13, 23; 13', 23') for amplifying the received signal, a variable signal level attenuator (40) for attenuating the amplified signal and a current source (15, 25, 010) for supplying the variable signal level attenuator (40), the individual signal paths (10, 20) being subsequently combined to a common path (1). A high transmission quality and low power consumption are achieved by the fact, that in each signal path (10, 20) the current source (15, 25, 010) supplying the variable signal level attenuator (40) is connected via the variable signal level attenuator (40) to the amplifier (13, 23; 13', 23') and the variable signal level attenuator (40) has in parallel a controllable bypass line (41) which comprises variable resistance means (42, 020).
H04B 7/08 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
41.
DROPOUT CONCEALMENT FOR A MULTI-CHANNEL ARRANGEMENT
The invention relates to a method for the concealment of dropouts in one or more channels (Z) of a multi-channel arrangement comprising at least two channels (Z, S), wherein in the event of a dropout in one channel (Z) a. replacement signal is generated with the aid of at least one error-free channel (S), characterised in that, during the error-free signal transmission of the channels (Z, S) a mapping of the transmitted signals (xz, xs) into the frequency domain is performed, the magnitude spectra (|SZ|,|SS|) being determined, spectral filter coefficients (H) are calculated that relate the magnitude spectrum (|SZ|) of a channel (Z) to the magnitude spectrum (|SS|) of at least one other channel (S), and that in the event of the dropout of a channel (Z) the replacement signal is generated by application of filter coefficients (H), computed prior to the dropout, to a substitution signal which consists of at least one error-free channel (S).
G10L 19/00 - Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocodersCoding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
A transducer membrane enhances sound reproduction. Curved portions of the membrane periphery contribute to the enhanced sound reproduction. The transducer membrane may add or improve sound reproduction capability in cell phones, gaming systems, personal data assistants, or other devices.
A system that models a microphone may include capsules that receive individual signals. The signals may be combined and modified based on a weighting factor. Directivity patterns of a converted signal may be modified or controlled based on the weighting of the signals.
The invention relates to device for the determination of the position and/or direction of at least one sound source in a fixed coordinate system, in whose center a microphone is located. To be able to exactly determine the position of individual sound sources with respect to the microphone and to adjust the directivity characteristics of the microphone signal dependent on the sound source distribution, the microphone comprises at least two capsules, the microphone having a changeable directional characteristic by processing the signals generated by the individual capsules, and the device has a light source (4) that emits bundled light, for example, a laser or a light source equipped with a lens and/or an aperure, and means for changing the direction of the light beam relative to the fixed coordinate system, as well as means for the determination of the direction of the light beam with reference to the fixed coordinate system.
A microphone system may include a housing having a housing opening. Pressure-gradient capsules may be provided in the housing. The capsules may include a diaphragm and at least one sound entry opening. One sound entry opening may be connected with a front side of the diaphragm in an acoustically conductive manner and another sound entry opening may be connected with a rear side of the diaphragm in an acoustically conductive manner. The sound entry openings may be located in each of the pressure-gradient capsule on an entry surface. The diaphragms of the pressure-gradient capsules may be oriented substantially parallel to each other. The sound entry opening may be directed into a space, which may be closed in a direction perpendicular to the entry surface. The space may be connected to the housing opening in an acoustically conductive manner. The microphone system may be compact and robust, and it may be suitable for use with hands-free devices.
A microphone system includes a microphone capsule, an audio amplifier and microphone electronics. A phantom power supply provides power to the audio amplifier and the microphone electronics through cable conductors. The microphone system includes a power supply that provides a supply voltage to the microphone electronics, a polarization voltage to the microphone capsule and a supply voltage to the audio amplifier. The power supply includes a constant current generator. The constant current generator operates as a constant current sink for the phantom power supply.
A microphone includes a microphone capsule biased with a polarization voltage from a winding on a transformer. The polarization voltage is controlled by a regulation circuit that may have an analog regulation circuit and a digital regulation circuit. A controller adjusts the polarization voltage that varies the sensitivity of the microphone.
09 - Scientific and electric apparatus and instruments
10 - Medical apparatus and instruments
Goods & Services
Physical, acoustic, optical and electotechnical apparatus, signalling, measuring and monitoring apparatus, photographic, cinematographic and radio apparatus, loudspeakers, voice machines, soundheads for record players, needles for voice machines, electroacoustic and cinematographic apparatus, replacement parts, individual parts and accessories (not included in other classes) for all the aforesaid goods; microphones, headphones, microphone and headphone voice recording devices; amplifiers, acoustic pick up, recording, transmission and reproduction apparatus, sound recording disks, sound tape cassettes, reverberation and delay apparatus, infra red sending, transmission and receiving apparatus and installations, ultra sound converters and accessories (not included in other classes), studio apparatus, vibration meters, acoustic positioning, locating and distance measuring apparatus, measuring apparatus, and integrated test assemblies for acoustic testing, sound frequency generators, stereophonic apparatus, projection apparatus and projection screens, stereo and colour film apparatus, including components and accessories (not included in other classes), acoustic component parts, in particular transformers for sound recording and reproduction, including transformers with built-in amplifiers. Acoustic medical apparatus, micromechanical apparatus for medical use.
09 - Scientific and electric apparatus and instruments
10 - Medical apparatus and instruments
Goods & Services
Physical, acoustic, optical and electotechnical apparatus, signalling, measuring and monitoring apparatus, photographic, cinematographic and radio apparatus, loudspeakers, voice machines, soundheads for record players, needles for voice machines, electroacoustic and cinematographic apparatus, replacement parts, individual parts and accessories (not included in other classes) for all the aforesaid goods; microphones, headphones, microphone and headphone voice recording devices; amplifiers, acoustic pick up, recording, transmission and reproduction apparatus, sound recording disks, sound tape cassettes, reverberation and delay apparatus, infra red sending, transmission and receiving apparatus and installations, ultra sound converters and accessories (not included in other classes), studio apparatus, vibration meters, acoustic positioning, locating and distance measuring apparatus, measuring apparatus, and integrated test assemblies for acoustic testing, sound frequency generators, stereophonic apparatus, projection apparatus and projection screens, stereo and colour film apparatus, including components and accessories (not included in other classes), acoustic component parts, in particular transformers for sound recording and reproduction, including transformers with built-in amplifiers. Acoustic medical apparatus, micromechanical apparatus for medical use.
09 - Scientific and electric apparatus and instruments
Goods & Services
Electroacoustic Equipment and Systems-, namely, Microphones, Headphones, Loudspeakers, [ Transducers, ] Reproducing Headsets, Amplifiers, Subassemblies and Parts for the Above; [ Phonograph Pickup Cartridges, Reverberation Units, Digital Delay Units, Infrared Transmitters and Receivers, Phonograph Needles, Sound Pickups for Record Players, Stereo Phonograph Cartridges, Ultrasonic Transducer Units, ] Audio Frequency Generators
