A method is provided for more effectively agitating a vibration responsive liquid in a container to enhance the qualities of the liquid. Vibration energy that is within the audio frequency spectrum and that corresponds to one or more resonant frequencies of the liquid filled container is coupled to the wall of the container. One or more vibration responsive sensors deployed in or on a container containing the vibration responsive liquid are used to determine the container's resonant frequencies. The method is particularly used in the aging of alcoholic beverages.
C12H 1/16 - Pasteurisation, stérilisation, conservation, purification, clarification ou vieillissement des boissons alcoolisées sans précipitation par des moyens physiques, p. ex. irradiation
C12G 1/06 - Préparation des vins mousseuxSaturation du vin en gaz carbonique
C12H 1/06 - Précipitation par des moyens physiques, p. ex. par irradiation, vibrations
C12H 1/22 - Vieillissement ou mûrissage par emmagasinage, p. ex. blondissement de la bière
H04R 1/22 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique de fréquence désirée uniquement
2.
METHOD AND SYSTEM FOR PERFORMING TRANSFER FUNCTION MEASUREMENTS ON A DEVICE
A method for performing transfer function measurements on a device such as a loudspeaker (referred to as a device under test or DUT) using a two-channel transfer function analyzer without a live copy of the DUT test signal. A virtual reference test signal, which is a copy of the DUT test signal, begins playing into a channel of the transfer function analyzer at the estimated start time and estimated play-back speed of the DUT test signal. The known play-back speed of the virtual reference test signal is compared to the estimated play-back speed of the DUT test signal and any detected differences between these two signals compensated for by either adjusting the play-back speed of the virtual reference test signal or the play-back speed of the DUT output, or both. A system for performing this method includes a virtual reference module having a detection part and adjustment part.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Room acoustics enhancement system, namely, a system
comprised of loudspeakers, microphones, signal processors
and electric control panels for enhancing the reverberation
of a room.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Signal processors for loudspeakers; signal processor sold as
component of loudspeakers; digital signal processor and
analog inputs and outputs therefor sold as component of
loudspeakers.
09 - Appareils et instruments scientifiques et électriques
Produits et services
(1) Room acoustics enhancement system, namely, a system comprised of loudspeakers, microphones, signal processors and electric control panels for enhancing the reverberation of a room.
09 - Appareils et instruments scientifiques et électriques
Produits et services
(1) Signal processors for loudspeakers; signal processor sold as component of loudspeakers; digital signal processor and analog inputs and outputs therefor sold as component of loudspeakers.
A system and method for delivering full-bandwidth sound to an audience in an audience space located in front of an acoustically reflective image screen such as a plasma, LCD, LED, or OLED screen. The sound delivery system provides for two separate and spatially displaced sound sources, namely, a high frequency loudspeaker for reproducing high frequency components of the sound associated with images displayed on the acoustically reflective image screen, and a separate low frequency loudspeaker for reproducing low frequency components of the image-associated sound. The high frequency loudspeaker or loudspeakers are positioned in front of the image screen to direct the high frequency components of the sound at the image screen where it is reflected back into the audience space, whereas the low frequency loudspeaker or loudspeakers are positioned at or about the acoustically reflective image screen and direct the low frequency components of the sound toward the audience space which are time-aligned with the high frequency components.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Downloadable software platforms for use in the configuration and management of loudspeaker systems Providing online non-downloadable software platforms for use in the configuration and management of loudspeaker systems
16.
FULL RANGE LOUDSPEAKER MODULE FOR PROVIDING SCALABLE LOUDSPEAKER SYSTEMS WITH VERTICAL AND HORIZONTAL BEAM STEERING CONTROL
A full frequency range loudspeaker module produces a steerable beam of acoustic energy and that can be readily configured with other similarly constructed modules to create a scalable loudspeaker system. The loudspeaker module is comprised of at least one low frequency transducer for producing a low frequency audio output a acoustically transparent mounting screen positioned in front of the low frequency transducer that supports a plurality of high frequency transducers in a two-dimensional array of high frequency transducers. The audio output from the low frequency transducer combines with the audio output of the high frequency transducers to produce a full range sound beam. Each transducer in the module is driven through a separate signal processing channel which provides the signal processing needed to steer the sound beam in a desired fashion. Modules can be combined for scalability and can be operated in either a loudspeaker mode or microphone mode.
H04R 1/20 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles
H04R 1/32 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique directionnelle désirée uniquement
H04R 1/26 - Dispositions dans l'espace de transducteurs séparés sensibles à plusieurs bandes de fréquences
H04R 3/12 - Circuits pour transducteurs pour distribuer des signaux à plusieurs haut-parleurs
H04R 5/02 - Dispositions spatiales ou structurelles de haut-parleurs
An apparatus for modifying a responsive liquid held in a barrel or other liquid container includes a transducer for producing vibration energy within the audio frequency range in response to an audio signal input and a coupler affixed to the transducer such that vibration energy produced in the transducer is transferred to the coupling device. The coupling device has a pusher end that extends beyond the front plane of the transducer and that contacts and pushes against the barrel wall when the apparatus is tied to the barrel wall. By determining the resonances of the liquid-filled barrel, audio input signals having sufficiently high levels at determined resonant frequencies can be chosen to achieve a maximum response in the liquid contained in the barrel. The apparatus is particularly suited for the sonic aging of whisky.
A23L 27/24 - Épices, agents aromatiques ou condiments synthétiques préparés par fermentation
B01F 3/08 - Mélange, p.ex. dispersion, émulsion, selon les phases à mélanger de liquides avec des liquides; Emulsion
B01F 11/02 - Mélangeurs avec mécanismes à secousses, oscillants ou vibrants au moyen de vibrations ultrasonores
C12G 1/06 - Préparation des vins mousseuxSaturation du vin en gaz carbonique
C12H 1/22 - Vieillissement ou mûrissage par emmagasinage, p. ex. blondissement de la bière
H04R 1/22 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique de fréquence désirée uniquement
H04R 1/28 - Supports de transducteurs ou enceintes conçus pour réponse de fréquence spécifiqueEnceintes de transducteurs modifiées au moyen d'impédances mécaniques ou acoustiques, p. ex. résonateur, moyen d'amortissement
A system and method for delivering full-bandwidth sound to an audience in an audience space located in front of an acoustically reflective image screen such as a plasma, LCD, LED, or OLED screen. The sound delivery system provides for two separate and spatially displaced sound sources, namely, a high frequency loudspeaker (27) for reproducing high frequency components of the sound associated with images displayed on the acoustically reflective image screen, and a separate low frequency loudspeaker (29) for reproducing low frequency components of the image-associated sound. The high frequency loudspeaker or loudspeakers are positioned in front of the image screen to direct the high frequency components of the sound at the image screen (25) where it is reflected back into the audience space, whereas the low frequency loudspeaker or loudspeakers are positioned at or about the acoustically reflective image screen to direct the low frequency components of the sound toward the audience space (12).
A system and method for delivering full-bandwidth sound to an audience in an audience space located in front of an acoustically reflective image screen such as a plasma, LCD, LED, or OLED screen. The sound delivery system provides for two separate and spatially displaced sound sources, namely, a high frequency loudspeaker (27) for reproducing high frequency components of the sound associated with images displayed on the acoustically reflective image screen, and a separate low frequency loudspeaker (29) for reproducing low frequency components of the image-associated sound. The high frequency loudspeaker or loudspeakers are positioned in front of the image screen to direct the high frequency components of the sound at the image screen (25) where it is reflected back into the audience space, whereas the low frequency loudspeaker or loudspeakers are positioned at or about the acoustically reflective image screen to direct the low frequency components of the sound toward the audience space (12).
An apparatus for modifying a responsive liquid held in a barrel or other liquid container includes a transducer for producing vibration energy within the audio frequency range in response to an audio signal input and a coupler affixed to the transducer such that vibration energy produced in the transducer is transferred to the coupling device. The coupling device has a pusher end that extends beyond the front plane of the transducer and that contacts and pushes against the barrel wall when the apparatus is tied to the barrel wall. By determining the resonances of the liquid-filled barrel, audio input signals having sufficiently high levels at determined resonant frequencies can be chosen to achieve a maximum response in the liquid contained in the barrel. The apparatus is particularly suited for the sonic aging of whisky.
C12H 1/22 - Vieillissement ou mûrissage par emmagasinage, p. ex. blondissement de la bière
C12H 1/06 - Précipitation par des moyens physiques, p. ex. par irradiation, vibrations
C12H 1/16 - Pasteurisation, stérilisation, conservation, purification, clarification ou vieillissement des boissons alcoolisées sans précipitation par des moyens physiques, p. ex. irradiation
H04R 1/22 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique de fréquence désirée uniquement
C12G 1/06 - Préparation des vins mousseuxSaturation du vin en gaz carbonique
26.
Signal generator and method for measuring the performance of a loudspeaker
A noise generator and method are provided for generating a test signal for measuring the performance of a loudspeaker over an operating broad band of frequencies ranging from low to high frequencies. A broadband random noise source is provided for generating broadband noise over the operating broad band of frequencies of the loudspeaker, and an impulsive noise source is additionally provided for generating random impulses of noise. The broadband noise and the randomly generated noise impulses are equalized to produce a composite noise signal having a desired crest factor as a function of frequency.
A boundary loaded acoustic testing system and method produces elevated amounts of acoustic energy in a defined test zone that can be utilized to induce vibrations in test articles that can fit within the test zone. The testing system and method is particularly suited to testing spacecraft and satellite components, such as solar panels, structural panels and dishes, having narrow dimensions in one plane, and which experience extreme vibrations during launch. A rigid boundary wall (15) is introduced into a space (12) and loudspeakers (11) direct acoustic energy at a test article (13) positioned in the test zone, which is a boundary - adjacent test zone (17) created immediately in front of the boundary wall. Preferably, the boundary wall (15) is situated in a lateral free field space to achieve a relatively narrow auto¬ correlation of th e sound pressure fields in the test zon e.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Sound reproduction systems, namely, systems comprised of
loudspeakers and digital signal processors for processing
the audio signals driving the loudspeakers.
A filter for correcting phase distortion produced at low frequencies in a loudspeaker system is created by inverting the phase response of the determined complex-valued frequency response of a loudspeaker system. The inverted phase response is obtained by taking the complex conjugate of the phase response. The impulse response for the inverted phase response is obtained by means of an inverse Fourier transform of the inverted phase response. The impulse response provides a linear phase FIR filter having a long filter length. The linear phase FIR filter is applied to the audio signal input to the loudspeaker system. Prior to inverting the phase response, the determined complex-valued frequency response of a loudspeaker system can be subjected to high frequency blanking and polynomial smoothing. Also, the linear phase FIR filter can be subjected to a window function prior to applying the filter to the audio signal.
09 - Appareils et instruments scientifiques et électriques
Produits et services
(1) Sound reproduction systems, namely, systems comprised of loudspeakers and digital signal processors for processing the audio signals driving the loudspeakers
A method for correcting magnitude and phase distortion in open ear hearing devices includes determining the insertion effect of the hearing device (12) substantially at the ear drum (11) when in the ear. Both the magnitude and phase response of the complex insertion transfer function (ITF) are corrected when the transfer function to the ear drum substantially matches the transfer function without the hearing device in place.
A method for correcting magnitude and phase distortion in open ear hearing devices includes determining the insertion effect of the hearing device (12) substantially at the ear drum (11) when in the ear. Both the magnitude and phase response of the complex insertion transfer function (ITF) are corrected when the transfer function to the ear drum substantially matches the transfer function without the hearing device in place.
The hearing aid includes a signal processor having a level-dependent filter section and a level-independent filter section. The level-dependent filter section provides level-dependent gain wherein sound is attenuated or amplified depending on the level of the incoming sound. The level-independent filter section provides substantially constant gain wherein sound that passes through the filter section is not changed in level, and provides transparency in that it corrects for insertion loss caused by the earpiece of the hearing aid when worn by the user. The level dependent and level independent filter sections, when fitted to the user, greatly improve the user's perception of sound.
A61N 1/36 - Application de courants électriques par électrodes de contact courants alternatifs ou intermittents pour stimuler, p. ex. stimulateurs cardiaques
09 - Appareils et instruments scientifiques et électriques
Produits et services
sound reproduction systems, namely, systems comprised of loudspeakers and digital signal processors for processing the audio signals driving the loudspeakers
43.
Magnitude and phase correction of a hearing device
A method for correcting magnitude and phase distortion in open ear hearing devices includes determining the insertion effect of the hearing device (12) substantially at the ear drum (11) when in the ear. Both the magnitude and phase response of the complex insertion transfer function (ITF) are corrected when the transfer function to the ear drum substantially matches the transfer function without the hearing device in place.
An arrayable loudspeaker (11) has at least one high frequency driver (39) mounted to a horn (37) and at least one pair of low frequency drivers (41) configured behind and in a closely spaced relationship to the horn to form low frequency side chambers (71) between the drivers and the horn from which acoustic energy produced by the low frequency drivers can propagate. Low frequency exit channels (77) above and below the horn are coupled to the low frequency side chambers (71). The configuration of the horn and low frequency drivers and the low frequency side chambers and low frequency exit channels is such that acoustical outputs of all drivers radiate coaxially from the loudspeaker with substantially constant wide beamwidth in the non-arraying plane. Signal processing can be added to enhance beamwidth control critical frequency ranges above crossover.
H04R 1/24 - Combinaisons structurelles de transducteurs séparés ou de parties du même transducteur et sensibles respectivement à plusieurs bandes de fréquences
H04R 1/40 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique directionnelle désirée uniquement en combinant plusieurs transducteurs identiques
H04R 1/28 - Supports de transducteurs ou enceintes conçus pour réponse de fréquence spécifiqueEnceintes de transducteurs modifiées au moyen d'impédances mécaniques ou acoustiques, p. ex. résonateur, moyen d'amortissement
An arrayable loudspeaker (11) has at least one high frequency driver (39) mounted to a horn (37) and at least one pair of low frequency drivers (41) configured behind and in a closely spaced relationship to the horn to form low frequency side chambers (71) between the drivers and the horn from which acoustic energy produced by the low frequency drivers can propagate. Low frequency exit channels (77) above and below the horn are coupled to the low frequency side chambers (71). The configuration of the horn and low frequency drivers and the low frequency side chambers and low frequency exit channels is such that acoustical outputs of all drivers radiate coaxially from the loudspeaker with substantially constant wide beamwidth in the non-arraying plane. Signal processing can be added to enhance beamwidth control in critical frequency ranges above crossover.
H04R 1/28 - Supports de transducteurs ou enceintes conçus pour réponse de fréquence spécifiqueEnceintes de transducteurs modifiées au moyen d'impédances mécaniques ou acoustiques, p. ex. résonateur, moyen d'amortissement
G10K 11/02 - Impédances acoustiques mécaniquesAdaptation d'impédance, p. ex. au moyen de pavillonsRésonateurs acoustiques
G10K 11/28 - Procédés ou dispositifs pour transmettre, conduire ou diriger le son pour focaliser ou pour diriger le son, p. ex. balayage utilisant la réflexion, p. ex. réflecteurs paraboliques
H04R 1/20 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles
H04R 1/30 - Combinaisons de transducteurs avec des pavillons, p. ex. avec des moyens d'équilibrage mécanique
09 - Appareils et instruments scientifiques et électriques
Produits et services
digital loudspeaker management systems, namely, software controlled digital matrix processors for driving and aligning loudspeakers of sound reinforcement systems employing multiple zones
50.
Hearing aid having level and frequency-dependent gain
An improved open-ear hearing aid to compensate for hearing loss includes a microphone for picking up incident sound and converting it to an electrical audio signal. An ear insert positionable within a human ear canal is provided for producing an output sound amplified within one or more frequency bands in response to incident sound picked up by the microphone. The in-band gain of the amplified sound output of the ear insert's loudspeaker is dependent on the user's hearing loss characteristics and the sound pressure levels of the incident sound. The form of the ear insert allows transmission of incident sound directly to the eardrum, where it is summed at the eardrum with the amplified sound output from the ear insert. Sound output is maximum at low incident sound pressure levels and minimum when the incident sound exceeds a set cut-off level.
A method for correcting magnitude and phase distortion in open ear hearing devices includes determining the insertion effect of the hearing device substantially at the ear drum when in the ear. Both the magnitude and phase response of the complex insertion transfer function (ITF) are corrected when the transfer function to the ear drum substantially matches the transfer function without the hearing device in place.
N, 15) for picking up sounds in the space (11) and reintroducing the sounds into the space such that the reintroduced sounds have an RT value and sound level capable of being adjusted and such that the resulting RT value can be adjusted to a relatively large value as compared to said baseline RT value.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Sound reproduction systems, namely, loudspeakers and digital
signal processors for driving and aligning the loudspeakers
of the sound reproduction system.
2. The order, n, of at least one, and preferably both of the shelving filters of the band filter sections can be selected for adjusting the slope of the shelving filter at one or both of its break point frequencies. The high and low n-order shelving filters forming the band filter sections have substantially the same gain and produce a resultant band gain for the band filter section. Gain correction is provided for the selectable n-order high shelving filter and n-order low shelving filter for correcting the resultant band gain to a base gain level.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Sound reproduction systems, namely, loudspeakers and digital signal processors for driving and aligning the loudspeakers of the sound reproduction system
64.
FILTER WITH INDEPENDENTLY ADJUSTABLE BAND GAIN AND BREAK POINT SLOPES AND METHOD OF CONSTRUCTING SAME
A filter for equalizing the frequency response of loudspeaker systems includes at least one band filter section (11) comprised an n-order high boost or cut shelving filter (13) having a break point frequency,ω1, and an n-order low boost or cut shelving filter (15) having a break point frequency, ω2, wherein ω1 < ω2. The order; n, of at least one, and preferably both of the shelving filters of the band filter sections can be selected for adjusting the slope of the shelving filter at one or both of its break point frequencies. The high and low n-order shelving filters forming the band filter sections have substantially the same gain and produce a resultant band gain for the band filter section. Gain correction is provided for the selectable n-order high shelving filter and n-order low shelving filter for correcting the resultant band gain to a base gain level.
An acoustically absorptive panel comprises a forward airspace bounded by an acoustically transparent front fabric stretch-mounted on a support frame, and the front face of a porous acoustical absorber, the forward air space, the front fabric and the porous absorber collectively acting as acoustical absorbing chamber, wherein oppositely disposed end panels of the front fabric extend around opposing side frame members of one or more frame structures of the support frame and are connected to a pair of spaced apart retaining struts disposed between the side frame members, the distance between the retaining struts adjustable by rotating one or more threaded tension adjusters thereby stretching or relaxing the front fabric across the support frame to adjust the frequency at which sound absorption will be maximized.
E04B 1/86 - Éléments absorbant le son en forme de dalles
E04B 1/82 - Isolation thermique ou acoustique, absorption ou réflexion de la chaleur ou du sonAutres méthodes de construction procurant des conditions thermiques ou acoustiques favorables, p. ex. par accumulation de chaleur à l'intérieur des murs spécifiquement relatives au son uniquement
An improved filtering system for loudspeaker equalization is comprised of two filtering sections, a single pole filtering section having single pole filters for shaping the frequency response of the audio signal over the operative bandwidth of the equalized loudspeaker system, and a parametric filtering section that provides for localized parametric equalization for compensating for room or other environmental resonances. The filtering system of the invention can be used to create a wide variety of useful filter shapes, while minimizing phase distortion that can harm the transient response of phase-aligned loudspeakers of a loudspeaker system.
09 - Appareils et instruments scientifiques et électriques
Produits et services
sound reproduction systems for professional use, namely, loudspeakers and digital signal processors for driving and aligning the loudspeakers of the sound reproduction system
69.
Hearing aid having level and frequency-dependent gain
An improved open-ear hearing aid to compensate for hearing loss includes a microphone for picking up incident sound and converting it to an electrical audio signal. An ear insert positionable within a human ear canal is provided for producing an output sound amplified within one or more frequency bands in response to incident sound picked up by the microphone. The in-band gain of the amplified sound output of the ear insert's loudspeaker is dependent on the user's hearing loss characteristics and the sound pressure levels of the incident sound. The form of the ear insert allows transmission of incident sound directly to the eardrum, where it is summed at the eardrum with the amplified sound output from the ear insert. Sound output is maximum at low incident sound pressure levels and minimum when the incident sound exceeds a set cut-off level.
An improved open-ear hearing aid to compensate for hearing loss includes a microphone 11 for picking up incident sound and converting it to an electrical audio signal. An ear insert 37 positionable within a human ear canal 35 is provided for producing an output sound amplified within one or more frequency bands in response to incident sound picked up by the microphone. The in-band gain of the amplified sound output of the ear insert's loudspeaker 29 is dependent on the user's hearing loss characteristics and the sound pressure levels of the incident sound. The form of the ear insert allows transmission of incident sound directly to the eardrum 39, where it is summed at the eardrum with the amplified sound output from the ear insert. Sound output is maximum at low incident sound pressure levels and minimum when the incident sound exceeds a set cut-off level.
H03G 9/20 - Combinaisons de plusieurs types de commande, p. ex. commande de gain et commande de tonalité dans des amplificateurs sélectifs en fréquence
H04R 25/02 - Appareils pour sourds adaptés pour être supportés entièrement par l'oreille
G01L 21/02 - Indicateurs de vide ayant une chambre de compression dans laquelle le gaz dont on doit mesurer la pression est comprimé
71.
Loudspeaker rigging system having upwardly extending connecting links
A loudspeaker rigging system having upwardly extending connecting links comprises splay adjustment and pivot links slidingly disposed in splay adjustment and pivot link stowing channels in a frame structure for the sides of a loudspeaker in a stack of loudspeakers, the splay adjustment and pivot links upwardly movable from stowed to linking positions, in the linking position the splay adjustment and pivot links linkable with locking pin holes in the bottom of the frame structure of a superjacent loudspeaker, the splay adjustment link having a plurality of splay angle slots of various lengths, the splay angle slots aligned with a plurality of splay angle selection pin holes in the frame structure, such that upon insertion of a linking pin in a selected splay angle selection pin hole and corresponding aligned splay angle slot the splay angle link may be raised upward to a selected splay angle.
H04R 1/40 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique directionnelle désirée uniquement en combinant plusieurs transducteurs identiques
09 - Appareils et instruments scientifiques et électriques
Produits et services
Digital loudspeaker management systems, namely, digital
matrix processors for driving and aligning loudspeakers of
sound reinforcement systems employing multiple zones.
73.
Loudspeaker system with extended constant vertical beamwidth control
A loudspeaker system has a high frequency channel for driving a horn loaded high frequency transducer, and a low frequency channel for driving a low frequency transducer. A signal processing circuit is provided which has at least one first order and at least one second order cross-over circuit portion in the high channel and at least one first order and at least one second order cross-over circuit portion in the low frequency channel. These cross-over portions produce a cross-over frequency range for the loudspeaker system that is below the cut-off frequency of the horn. The signal processing circuit, including its cross-over circuit portions and in conjunction with the design of the expansion walls of the horn, extends vertical beamwidth control of the acoustic output of the loudspeaker system at the loudspeaker system's lower frequency range.
A loudspeaker rigging system having upwardly extending connecting links comprises splay adjustment and pivot links (36, 38) slidingly disposed in splay adjustment and pivot link stowing channels (118, 120) in a frame structure (48) for the sides of a loudspeaker in a stack of loudspeakers, the splay adjustment and pivot links upwardly movable from stowed to linking positions, in the linking position the splay adjustment and pivot links linkable with locking pin holes (66, 68) in the bottom of the frame structure of a superjacent loudspeaker, the splay adjustment link having a plurality of splay angle slots (94) of various lengths, the splay angle slots aligned with a plurality of splay angle selection pin holes (64) in the frame structure, such that upon insertion of a linking pin (50) in a selected splay angle selection pin hole and corresponding aligned splay angle slot the splay angle link may be raised upward to a selected splay angle.
H04R 1/02 - BoîtiersMeublesMontages à l'intérieur de ceux-ci
H04R 1/32 - Dispositions pour obtenir la fréquence désirée ou les caractéristiques directionnelles pour obtenir la caractéristique directionnelle désirée uniquement
75.
LOUDSPEAKER RIGGING SYSTEM HAVING UPWARDLY EXTENDING CONNECTING LINKS
A loudspeaker rigging system having upwardly extending connecting links comprises splay adjustment and pivot links (36, 38) slidingly disposed in splay adjustment and pivot link stowing channels (118, 120) in a frame structure (48) for the sides of a loudspeaker in a stack of loudspeakers, the splay adjustment and pivot links upwardly movable from stowed to linking positions, in the linking position the splay adjustment and pivot links linkable with locking pin holes (66, 68) in the bottom of the frame structure of a superjacent loudspeaker, the splay adjustment link having a plurality of splay angle slots (94) of various lengths, the splay angle slots aligned with a plurality of splay angle selection pin holes (64) in the frame structure, such that upon insertion of a linking pin (50) in a selected splay angle selection pin hole and corresponding aligned splay angle slot the splay angle link may be raised upward to a selected splay angle.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Sound reproduction systems meeting specified performance
criteria comprised of loudspeakers and software controlled
digital signal processors for driving and aligning the
loudspeakers of the sound reproduction system.
An acoustically absorptive panel comprises a porous acoustical absorber having a planar configuration mounted on a support frame, an acoustically transparent front fabric stretch-mounted on the support frame and spaced from and in parallel alignment with the front face of the porous acoustical absorber and forming an airspace, the porous absorber, front fabric and forward air space acting as acoustical absorbing chamber capable of absorbing a greater range of sound frequencies than the porous acoustical absorber alone, the range of frequencies absorbed depending on the depth of the air space.
09 - Appareils et instruments scientifiques et électriques
Produits et services
(1) Sound reproduction systems meeting specified performance criteria comprised of loudspeakers and software controlled digital signal processors for driving and aligning the loudspeakers of the sound reproduction system
09 - Appareils et instruments scientifiques et électriques
Produits et services
Sound reproduction systems meeting specified performance criteria comprised of loudspeakers and software controlled digital signal processors for driving and aligning the loudspeakers of the sound reproduction system
83.
Integrated rigging system for loudspeakers with vertically and horizontally oriented locking pin holes and dolly board placed in abutment with adjacent dolly boards
An integrated rigging system for loudspeakers comprises top and base front and top and base rear rigging structures for mounting to the internal framework of the loudspeaker and for forming the top front, base front, top rear and base rear portions of the loudspeaker's enclosure, and a plurality of links, each link extendable from a link stowing channel in one of the rigging structures into a link receiving slot in the corresponding rigging structure of the enclosure of an abutting loudspeaker for linking the rigging structure of the loudspeaker with the corresponding rigging structure of the enclosure of the abutting loudspeaker.
A circuit for reducing noise in Class D amplifiers has a power stage voltage control means (17, 21, 22) responsive to defined signal conditions of the audio signal input (1). The power stage voltage control means is operative to lower the voltage at the supply voltage input (31) of the amplifier's switching power output stage (30) upon the detection of a defined condition in the audio signal input such that the Class-D amplifier operates at reduced voltage (“idles”) during the defined audio input signal condition.
H03F 3/38 - Amplificateurs de courant continu, comportant un modulateur à l'entrée et un démodulateur à la sortieModulateurs ou démodulateurs spécialement conçus pour être utilisés dans de tels amplificateurs
H03F 3/68 - Combinaisons d'amplificateurs, p. ex. amplificateurs à plusieurs voies pour stéréophonie
85.
CIRCUIT AND METHOD FOR REDUCING NOISE IN CLASS D AUDIO AMPLIFIERS
A circuit for reducing noise in Class D amplifiers has a power stage voltage control means (17, 21, 22) responsive to defined signal conditions of the audio signal input (1). The power stage voltage control means is operative to lower the voltage at the supply voltage input (31) of the amplifier's switching power output stage (30) upon the detection of a defined condition in the audio signal input such that the Class-D amplifier operates at reduced voltage ("idles") during the defined audio input signal condition.
A circuit for reducing noise in Class D amplifiers has a power stage voltage control means (17, 21, 22) responsive to defined signal conditions of the audio signal input (1). The power stage voltage control means is operative to lower the voltage at the supply voltage input (31) of the amplifier's switching power output stage (30) upon the detection of a defined condition in the audio signal input such that the Class-D amplifier operates at reduced voltage ("idles") during the defined audio input signal condition.
A loudspeaker is provided that passively achieves a directional polar response at low frequencies with a high degree of attenuation between the front and the back of the loudspeaker. The loudspeaker 11 has a transducer 13, an enclosure 21 behind the transducer, and port openings 29 in the sidewalls 23 of the enclosure to allow a back-wave produced by the transducer to exit the enclosure and combine with the front wave produced by the transducer. Cancellation behind the loudspeaker at low frequencies is achieved by delaying the back wave with low loss. Low loss delay at low frequencies is achieved by inserting a low-density fibrous fill material 33 in the acoustic chamber 27 formed behind the transducer 13 by the enclosure 21. A fibrous material is selected having a low-pass transfer function and low acoustic loss in its low-frequency pass band.
A loudspeaker is provided that passively achieves a directional polar response at low frequencies with a high degree of attenuation between the front and the back of the loudspeaker. The loudspeaker 11 has a transducer 13, an enclosure 21 behind the transducer, and port openings 29 in the sidewalls 23 of the enclosure to allow a back- wave produced by the transducer to exit the enclosure and combine with the front wave produced by the transducer. Cancellation behind the loudspeaker at low frequencies is achieved by delaying the back wave with low loss. Low loss delay at low frequencies is achieved by inserting a low-density fibrous fill material 33 in the acoustic chamber 27 formed behind the transducer 13 by the enclosure 21. A fibrous material is selected having a low-pass transfer function and low acoustic loss in its low- frequency pass band.
A loudspeaker system has a plurality of relatively small transducer elements configured in a closely spaced transducer array such that their acoustic outputs combine to produce a focused beam of sound in front of the array that is substantially uniform about the beams radiation axis. The transducer array lies in a plane and has a perimeter that approximates a circle, and will have fill-factor with respect to a circle circumscribing the array of at least approximately 70%. In one variation of the loudspeaker system, the transducer array is constructed in smaller transducer array modules that are operatively fitted together to produce a larger array.
A loudspeaker system has a plurality of relatively small transducer elements configured in a closely spaced transducer array such that their acoustic outputs combine to produce a focused beam of sound in front of the array that is substantially uniform about the beams radiation axis. The transducer array lies in a plane and has a perimeter that approximates a circle, and will have fill-factor with respect to a circle circumscribing the array of at least approximately 70%. The transducer array is constructed in smaller transducer array modules that are operatively fitted together to produce a larger array.
A loudspeaker system has of a plurality of relatively small, closely spaced transducer elements (19), the acoustic outputs of which combine to create a synthesized sound field having a characteristic polar pattern. The polar pattern can be a fixed polar pattern that is dependent on the number of transducers and transducer size, geometry and spacing, or a contrallable polar pattern. For a controllable polar pattern, the transducer elements can individually be controlled by a distributed input control circuit (13, 14, 15, 16, 17), which includes digital signal processing.
Common metals and their alloys; metal building materials; transportable buildings of metal; materials of metal for railway tracks; non-electric cables and wires of common metal; ironmongery, small items of metal hardware; pipes and tubes of metal; safes; goods of common metal not included in other classes; ores; metal rigging for hanging loudspeakers, consisting primarily of aluminium and steel frames, top grids, chains, steel ropes, L-track, L-track clips, hammerlocks, and lynch pins.
A loudspeaker having a vented enclosure with at least one tuning port includes a fan inside the vented enclosure, which is positioned to produce airflow for cooling the magnetic assembly of the loudspeaker's transducer. Airflow within said vented enclosure is produced such that air within the enclosure is exchanged with outside air through the at least one tuning port. Typically, the vented enclosure will have two tuning ports wherein outside air drawn into the enclosure through one of the tuning ports is circulated out through the other tuning port. Preferably, the outside air drawn in through one tuning port is circulated directly around the transducer magnetic assembly for greatest heat dissipation.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Room acoustics enhancement system, namely, a system comprised of loudspeakers, microphones, signal processors and electric control panels for enhancing the reverberation of a room.
09 - Appareils et instruments scientifiques et électriques
41 - Éducation, divertissements, activités sportives et culturelles
Produits et services
Sound reproduction equipment, namely, loudspeakers, line drivers, equalizers, audio analyzers, loudspeaker management systems featuring software controlled digital matrix processors for driving and aligning loudspeakers of sound reinforcement systems employing multiple zones and loudspeaker monitoring systems featuring software for delivering extensive status and system performance data directly to the operator from every installed speaker Educational services, namely, conducting classes, seminars and workshops in the field of sound reproduction and the set-up, installation, configuration and operation of sound reproduction equipment
99.
Loudspeaker rigging system having contained maneuverable connecting links
A side frame for a loudspeaker rigging system has a frame structure mountable to the side of a loudspeaker, and links associated with the frame structure for linking together the corners of the frame structures of vertically adjacent side frames. The links associated with each side frame structure include a pivot link and splay adjustment link, each of which has a top extended end and a base end. Stow channels, which are preferably located in the bottom corner regions of the frame structure, contain the pivot link and splay adjustment link in the frame structure. A gripping structure associated with at least one, and preferably each link of the pivot and splay adjustment links allows a user to easily maneuver a link from its stowed to its deployed position. The extended end of the splay adjustment link includes at least two, and preferably an array of pin holes which can selectively be matched with one pin hole within a row of pin holes in a bottom corner region of the side frame to permit adjustments of the splay angle over a range of angles. Suitably, two rows of pin holes are provided in the top extended end of the splay adjustment link to permit multiple and incrementally small splay angle adjustments.
In the preferred embodiment, the frame structure is comprised of an assembly of parts comprised of a center core structure sandwiched between two side plates.
09 - Appareils et instruments scientifiques et électriques
Produits et services
Room acoustics enhancement system, namely, a system comprised of loudspeakers, microphones, signal processors and electric control panels for enhancing the reverberation of a room
