Patents
Sitemap › H04 - Electric communication technique › H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; Deaf-aid sets; Public address systems › H04R 3 - Circuits for transducers
Patents for H04R 3 - Circuits for transducers (18,190)
05/2000
05/31/2000CN1255036A Multitone ring and driver transducer
05/30/2000US6069962 Point source speaker system
05/30/2000US6069961 Microphone system
05/30/2000US6069960 Connector device for information-handling apparatus and connector device for stereophonic audio/video apparatus
05/30/2000US6069958 Listening apparatus for remote wildlife sound acquistion
05/30/2000CA2120019C Sound acquisition method and system, and sound acquisition and reproduction apparatus
05/25/2000WO2000030403A2 Dynamic bass control circuit with variable cut-off frequency
05/25/2000WO2000030402A1 Microphone array with high directivity
05/25/2000CA2350549A1 Microphone array with high directivity
05/24/2000EP1003285A2 Loudness device
05/24/2000EP1003283A2 Audio signal processing device
05/24/2000EP1003282A2 Integrated circuit for processing audio signal
05/24/2000EP1002445A1 Sound radiating devices/systems
05/23/2000US6067655 Burst error limiting symbol detector system
05/23/2000US6067364 Mechanical acoustic crossover network and transducer therefor
05/23/2000US6067363 Audio A/D convertor using frequency modulation
05/22/2000WO2000030404A1 Binaural signal processing techniques
05/18/2000WO2000028784A1 Method for in-situ measuring and in-situ correcting or adjusting a signal process in a hearing aid with a reference signal processor
05/18/2000WO2000028783A1 Method for in-situ measuring and correcting or adjusting the output signal of a hearing aid with a model processor and hearing aid employing such a method
05/18/2000WO2000028740A2 Improved signal localization arrangement
05/18/2000WO2000028523A1 Karaoke (sing-along) device
05/18/2000WO2000028522A1 Portable microphone device for karaoke (sing-along) and sing-along machine
05/18/2000DE19851998A1 Schaltungsanordnung zum Erzeugen eines Ausgangssignals A circuit arrangement for generating an output signal
05/17/2000EP1001652A2 Automatic loudspeaker equalizer
05/17/2000EP1001527A2 Circuit for generating an output signal
05/17/2000CN1253464A 3D sound regeneration equipment and method for many listeners
05/16/2000US6064860 Wireless transmission and reception system
05/10/2000EP0999689A1 Echo cancelling device and method
05/09/2000US6061456 Noise cancellation apparatus
05/09/2000CA2248433C Inductive braking in a dual coil speaker driver unit
05/04/2000WO2000006309A3 Off-aperture electrical connection for ultrasonic transducer
05/03/2000EP0998168A1 Compensation system for planar loudspeakers
05/03/2000EP0998167A2 Microphone array system
05/03/2000EP0998166A1 Device for audio processing,receiver and method for filtering the wanted signal and reproducing it in presence of ambient noise
05/03/2000EP0997055A1 Method for electronically selecting the dependency of an output signal from the spatial angle of acoustic signal impingement and hearing aid apparatus
05/02/2000US6058195 Adaptive controller for actuator systems
05/02/2000US6058194 Sound-capture and listening system for head equipment in noisy environment
04/2000
04/27/2000DE19942526A1 Motional feedback speaker unit inputs acoustic signal to first voice coil and senses vibration of a loudspeaker, returning feedback signal to an amplifier, which applies it to second voice coil
04/27/2000DE19846821A1 Audiokommunikationssystem Audio communication system
04/26/2000EP0996310A1 Method for determining the position and the intensity of sound sources
04/26/2000EP0995336A1 Method and apparatus for formatting the digital audio signal for use of the sound reproduction
04/26/2000EP0995189A1 Combined speech coder and echo canceler
04/26/2000EP0995188A1 Methods and apparatus for measuring signal level and delay at multiple sensors
04/25/2000US6055417 System for using a microphone in an object at a sporting event
04/25/2000CA2193152C Telephone handset interface with feedback control
04/20/2000WO2000022876A1 Point source speaker system
04/20/2000DE19847689A1 Arrangement for 3-dimensional sound reproduction has inverse filter module for filtering sound input signal, time multiplex module that selects order filtering, and several loudspeakers
04/19/2000CN1251192A Audio processing arrangement with multiple sources
04/13/2000WO2000021331A1 Environment adaptable loudspeaker
04/13/2000WO2000021194A1 Dual-sensor voice transmission system
04/13/2000DE19947682A1 Method and zero delay structure for compensating for echoes and sub-band echoes avoids delays usually occurring in sub-band sectioning and/or sub-band reconstruction
04/13/2000DE19843731A1 Sound transducer arrangement has circuit board that forms acoustic component for influencing acoustic properties of sound transducer
04/12/2000EP0993229A2 Audio communication system
04/12/2000EP0992182A1 Device for protecting an electric circuit against interface micro-discharges
04/11/2000US6049607 Interference canceling method and apparatus
04/11/2000US6047601 Self-tuning crystal notch filter
04/07/2000CA2285137A1 Zero-delay structure for sub-band echo cancellation
04/06/2000WO2000019605A2 Band-limited adaptive feedback canceller for hearing aids
04/05/2000EP0991297A2 3D woofer drive circuit
04/05/2000EP0990369A2 Sound reproduction system
04/05/2000CN2372857Y Wireless signal transmitting-receiving active loudspeaker box
04/05/2000CN1249891A Audio system comprising audio signal processing circuit
04/05/2000CN1249890A Audio system comprising audio signal processing circuit
04/05/2000CN1249889A Device and method for processing speech
04/04/2000CA2215764C Process for controlling a programmable or program-controlled hearing aid for its in-situ fitting adjustment
03/2000
03/30/2000WO2000018188A2 Public address apparatus
03/30/2000WO2000018182A1 Parametric loudspeaker with electro-acoustical diaphragm transducer
03/30/2000WO2000018099A1 Interference canceling method and apparatus
03/30/2000WO2000018085A1 Method and device for acoustic compensation
03/30/2000WO2000018031A1 Method and device for developing a virtual speaker distant from the sound source
03/30/2000CA2345339A1 Parametric loudspeaker with electro-acoustical diaphragm transducer
03/30/2000CA2345336A1 Method and device for developing a virtual speaker distant from the sound source
03/30/2000CA2344480A1 Interference canceling method and apparatus
03/29/2000EP0989774A2 Audio system having a mixing function
03/29/2000EP0989773A2 Soundtransducer apparatus
03/29/2000EP0561881B1 Compensating filters
03/29/2000CN2371747Y Music rhythm sensing loudspeaker with power amplifier
03/29/2000CN2371746Y Music rhythm sensing loudspeaker with low-pass filter
03/29/2000CN1249119A Microphone and receiver for automatic accompaniment
03/29/2000CN1249053A Improved audio reproduction arrangement and telephone terminal
03/29/2000CN1248880A Loudspeak polarity judging circuit and audio circuit with function of polarity judging and switching
03/29/2000CN1248819A 数字功率放大器 Digital Power Amplifier
03/29/2000CN1248760A Device for processing microphone signal of karaoke equipment
03/29/2000CN1050962C Anti-noise earphone
03/23/2000WO2000016588A1 Transmission line loudspeaker with compound driver
03/22/2000EP0986933A1 Continuous frequency dynamic range audio compressor
03/22/2000EP0986932A2 Cabin communication system
03/22/2000CN1050728C Loudspeaker system
03/21/2000US6041290 Method of adaptively adjusting the coefficients of a digital filter in an echo canceller
03/21/2000US6041127 Steerable and variable first-order differential microphone array
03/21/2000US6041126 Noise cancellation system
03/16/2000WO2000015003A2 Low-frequency audio enhancement system
03/16/2000WO2000014998A1 Means for bass enhancement in an audio system
03/16/2000WO2000014997A1 Loudspeaker device
03/15/2000CN2369436Y Adjustable ultrahigh frequency compensator
03/15/2000CN2369435Y Low audio frequency compensating circuit
03/15/2000CN2369434Y Automatic protector for speaker
03/15/2000CN1247444A Multi-channel low-frequency circuit with controllable HF and MF sound pressures for sound enclosure
03/14/2000US6038325 Speaker system for use in an automobile vehicle
03/08/2000EP0984661A2 Transmitter-receiver having ear-piece type acoustic transducer part
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