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)
09/1998
09/16/1998EP0864245A1 Method for reproducing ball sounds during a sporting event, and ball therefor
09/16/1998CN1193450A Circuit, audio system and method for processing signals and harmonics generator
09/15/1998US5809156 Sound reproduction device with active noise compensation
09/15/1998US5809153 Loudspeaker system
09/15/1998US5808967 Acoustic system
09/15/1998CA2117931C Adaptive microphone array
09/11/1998WO1998039946A1 Device and method for processing speech
09/11/1998WO1998039863A2 Audio crossover circuit
09/08/1998US5805716 For processing a received audio signal
09/08/1998US5805715 Method and apparatus for compensating multi-resolution linear distortion
09/06/1998CA2199348A1 Asymmetrical driver for asymmetrical loudspeakers
09/03/1998WO1998038833A1 Voice recording prevention system
09/02/1998EP0862351A2 Loudspeaker
09/02/1998CN1192116A Microphone
08/1998
08/27/1998WO1998037732A1 Single loudspeaker drive system and method
08/27/1998WO1998037731A1 High-fidelity and high-efficiency analog amplifier combined with digital amplifier
08/27/1998DE19712280A1 Audio system with wireless signal transmission
08/26/1998EP0861009A2 Method for setting audio parameters in a digital signal processor and an electronic device
08/25/1998US5799042 Wireless digital communication system, a radio apparatus, a digital speaker, and a digital speaker controlling apparatus
08/19/1998EP0858720A1 Method and apparatus for reduction of unwanted feedback
08/18/1998US5796305 Amplifier arrangements with high damping factor
08/18/1998CA2150819C Gradient directional microphone system and method therefor
08/06/1998WO1998034352A1 Bi-directional asynchronous telecommunication audio signal processing
08/06/1998CA2279390A1 Bi-directional asynchronous telecommunication audio signal processing
08/05/1998CN1189759A Whole-phase frquency divider for loudspeaker
07/1998
07/29/1998CN1189285A Electronic acoustic device
07/28/1998US5787183 Microphone system for teleconferencing system
07/21/1998US5784476 Audio signal reproduction apparatus
07/21/1998US5784474 Method and circuit for improving the polar response of a two-way horn-loaded loudspeaker system
07/21/1998US5784472 Process and circuitry for the supplying of loudspeakers and other electrical consumers in vehicle doors with signals
07/21/1998US5784361 Bi-directional asynchronous telecommunication audio signal processing
07/21/1998CA2007435C Electronic gaming device with pseudo-stereophonic sound generating capabilities
07/15/1998EP0853442A2 Earphone
07/14/1998US5781645 Loudspeaker system
07/14/1998US5781642 Speaker system
07/09/1998WO1998030064A1 Processing audio signals
07/08/1998EP0792568A4 Noise cancellation apparatus
07/08/1998EP0792567A4 Noise cancellation headset for use with stand or worn on ear
07/07/1998US5778082 Method and apparatus for localization of an acoustic source
07/02/1998DE19739526A1 Interconnection of bass, bass/medium frequency (MF), MF and HF loudspeakers in Hi=Fi enclosures without coils or capacitors
07/02/1998DE19654678A1 Passive filter network for distortion correction of Hi=Fi system loudspeaker overall transfer characteristic
06/1998
06/30/1998US5774791 Low power wireless communication system employing magnetic control zones
06/30/1998US5774562 Method and apparatus for dereverberation
06/30/1998US5774557 Autotracking microphone squelch for aircraft intercom systems
06/23/1998US5771300 Loudspeaker phase distortion control using velocity feedback
06/23/1998US5771297 Electronic audio device and method of operation
06/18/1998WO1998026631A1 Power supply for microphone
06/17/1998EP0847666A1 Panel-form loudspeakers
06/17/1998EP0847661A2 Acoustic device
06/17/1998EP0847567A1 A vending machine
06/16/1998US5768601 Apparatus for eliminating audio noise when power is cycled to a computer
06/16/1998US5768398 Signal amplification system with automatic equalizer
06/11/1998WO1998025214A1 Method and device for non-stationary separation of signals of various sources
06/10/1998EP0847225A2 Electroacoustical transducing
06/10/1998EP0847224A1 Device for detecting sound sources and method for operating the same
06/09/1998US5764781 Sound reproduction system
06/04/1998DE19652336A1 Verfahren und Vorrichtung zur nichtstationären Quellentrennung Method and apparatus for non-stationary source separation
06/03/1998EP0761074B1 Self-damping speaker matching device and method
06/03/1998CN1183832A Adaptive noise cancelling arrangement, noise reduction system and transceiver
06/02/1998US5761320 Audio distribution system having programmable zoning features
06/02/1998US5760825 Sound pickup system comprising a video system for the setting of parameters and setting method
05/1998
05/28/1998DE19720217A1 Automatic equalising arrangement for multi-channel audio system
05/27/1998EP0843951A1 Circuit, audio system and method for processing signals, and a harmonics generator
05/27/1998EP0843934A1 Arrangement for suppressing an interfering component of an input signal
05/27/1998EP0826140A4 Intensity acoustic calibrator
05/27/1998CN1183018A Transmitter capable of reducing background noise
05/26/1998US5757938 High efficiency encoding device and a noise spectrum modifying device and method
05/26/1998US5757937 Acoustic noise suppressor
05/26/1998US5757928 Audio amplifier arrangement for more than two reproduction channels
05/26/1998US5757104 Method of operating an ultransonic piezoelectric transducer and circuit arrangement for performing the method
05/20/1998EP0843502A1 Howling detection and prevention circuit and a loudspeaker system employing the same
05/20/1998EP0843455A2 Method and apparatus for adaptive echo cancellation
05/20/1998EP0565526B1 Adaptive acoustic echo canceller
05/20/1998CN1182270A Apparatus for compensating frequency characteristic of reproduction audio signal
05/19/1998US5754667 Audio filter with magnetic field cancellation
05/19/1998US5754665 Noise Canceler
05/15/1998CA2219347A1 Method of adaptively adjusting the coefficients of a digital filter in an echo canceller
05/14/1998DE19645867A1 Multiple channel sound transmission method
05/13/1998EP0841836A2 Dynamic equalizing/filtering device
05/13/1998EP0841799A2 Stereophonic acoustic echo cancellation using non-linear transformations
05/12/1998US5751822 Ambient noise suppression circuit
05/12/1998US5751818 Circuit system for switching loudspeakers
05/07/1998WO1998001956A3 Microphone noise rejection system
05/07/1998DE19650410C1 Noise and echo suppression method for hands-free telephone communication
05/05/1998US5748754 Sound system gain and equalization circuit
05/05/1998US5748753 High power audio subwoofer
05/05/1998US5748751 Signal amplifier system with improved echo cancellation
05/05/1998US5748725 Telephone set with background noise suppression function
04/1998
04/30/1998WO1998018292A1 Architecture for a universal serial bus-based pc speaker controller
04/29/1998EP0838973A1 Loudspeaker phase distortion control using velocity feedback
04/29/1998CN1180470A Improvement in or relating to loudspeakers
04/28/1998US5745585 Dynamic equalization method and device
04/28/1998US5745584 Sound bubble structures for sound reproducing arrays
04/28/1998US5745057 Adjustment operating apparatus
04/22/1998CN1179690A Loudspeaker phase distortion control using velocity feedback
04/16/1998WO1998015846A1 Two-dimensional array transducer and beamformer
04/15/1998CN1179241A Dual action automatic sound level control
04/14/1998US5740256 Adaptive noise cancelling arrangement, a noise reduction system and a transceiver
04/08/1998EP0835039A2 Method and device for correcting the frequency band of an acoustic transmitter
04/07/1998US5737433 Sound environment control apparatus
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