| Patents for H04R 3 - Circuits for transducers (18,190) |
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| 02/28/2002 | US20020025054 Audio signal processing device, interface circuit device for angular velocity sensor and signal processing device |
| 02/28/2002 | US20020025051 Mixing apparatus for audio data, method of controlling the same, and mixing control program |
| 02/28/2002 | US20020023497 Method of and apparatus for controlling beams produced by a cylindrical transducer |
| 02/27/2002 | EP1182748A2 Multiple configuration loudspeaker terminals |
| 02/26/2002 | US6351542 Loudspeakers with panel-form acoustic radiating elements |
| 02/26/2002 | US6351532 Echo canceler employing multiple step gains |
| 02/21/2002 | WO2002015639A2 Loudspeaker having adjustable motor strength |
| 02/21/2002 | WO2002015395A1 Voice enhancement system |
| 02/21/2002 | WO2002015169A1 Multi-device audio-video with common echo canceling |
| 02/21/2002 | US20020021799 Multi-device audio-video combines echo canceling |
| 02/20/2002 | EP1180864A2 Cross fader using two optocouplers |
| 02/20/2002 | EP1180454A2 Ultra low power seatbelt mounted wireless microphone for automotive control applications |
| 02/20/2002 | EP1180300A1 Acoustic echo cancellation |
| 02/20/2002 | EP1005783B1 A method for electronically beam forming acoustical signals and acoustical sensor apparatus |
| 02/14/2002 | WO2002013574A2 Bending wave loudspeaker |
| 02/14/2002 | WO2002013573A1 Loudspeaker device |
| 02/14/2002 | WO2002013572A2 Method and apparatus for filtering and compressing sound signals |
| 02/14/2002 | WO2001033902A3 Parametric loudspeaker with improved phase characteristics |
| 02/14/2002 | US20020018578 Bending wave loudspeaker |
| 02/14/2002 | US20020018573 Microphone-tailored equalizing system |
| 02/14/2002 | US20020017982 Switch's click tone output unit, switch's click tone outputting method, and audio unit for the switch's click tone output unit |
| 02/13/2002 | EP1179286A2 Transducer driver |
| 02/13/2002 | EP0824786A4 Audio crossover circuit |
| 02/13/2002 | CN1335693A Inputting device, reproducing device and sound volume regulating method |
| 02/07/2002 | US20020015504 Mixing apparatus with recording/reproducing function |
| 02/07/2002 | US20020015503 Method and apparatus for filtering and compressing sound signals |
| 02/07/2002 | US20020015502 Audio system, in particular for motor vehicles |
| 02/07/2002 | US20020015499 Infrabass |
| 02/05/2002 | CA2098190C Compensating filters |
| 01/31/2002 | WO2001020948A3 Mems digital-to-acoustic transducer with error cancellation |
| 01/31/2002 | US20020013695 Method for noise suppression in an adaptive beamformer |
| 01/31/2002 | US20020012900 Song and image data supply system through internet |
| 01/30/2002 | EP1176848A2 Audio signal processing device, interface circuit device for angular velocity sensor and signal processing device |
| 01/30/2002 | EP1175792A1 Mobile communication terminal and car mounted electronic device |
| 01/30/2002 | CN1333994A Binaural signal processing techniques |
| 01/29/2002 | US6343132 Loudspeaker |
| 01/24/2002 | WO2002007308A2 Infrabass |
| 01/24/2002 | WO2001039370A3 Signal processing system and method |
| 01/24/2002 | US20020009203 Method and apparatus for voice signal extraction |
| 01/24/2002 | DE10032666A1 Audiosystem für ein Kraftfahrzeug Audio system for a motor vehicle |
| 01/23/2002 | EP1175093A2 Audio and video recording and reproduction apparatus |
| 01/23/2002 | CN1332519A Level adjusting circuit |
| 01/22/2002 | CA2212658C Voice activity detection using echo return loss to adapt the detection threshold |
| 01/17/2002 | WO2002005261A2 Dynamic power sharing in a multi-channel sound system |
| 01/17/2002 | US20020006081 Multi-channel audio reproducing apparatus |
| 01/17/2002 | CA2414501A1 Dynamic power sharing in a multi-channel sound system |
| 01/16/2002 | EP1173041A2 Electro-mechanical-acoustic transducing device |
| 01/16/2002 | EP1171990A1 Method and apparatus for space-time echo cancellation |
| 01/16/2002 | EP1064822B1 Method and device for operating a microphone system, especially in a motor vehicle |
| 01/16/2002 | CN1331901A Parametric loudspeaker with electro-acoustical disphragm transducer |
| 01/16/2002 | CN1331554A 推挽式扬声系统 Push-speaker system |
| 01/10/2002 | WO2002003755A2 Audiosystem for an automobile |
| 01/10/2002 | WO2002003754A1 Microphone array system |
| 01/10/2002 | WO2002003753A1 Communication system for noisy environments |
| 01/10/2002 | WO2002003750A2 Improved directional microphone system |
| 01/10/2002 | WO2002003749A2 Adaptive microphone array system with preserving binaural cues |
| 01/10/2002 | WO2002003747A2 A/d converter with integrated biasing for a microphone |
| 01/10/2002 | US20020003841 Method of high-frequency signal transmission |
| 01/09/2002 | EP1170976A1 Communication system for noisy environments |
| 01/09/2002 | EP1169884A1 Flat surface loudspeaker and method for operating the same |
| 01/09/2002 | EP1169883A1 System and method for dual microphone signal noise reduction using spectral subtraction |
| 01/09/2002 | EP1169687A1 A vibrator and a method of controlling a vibrator |
| 01/09/2002 | CN1330505A Fully digitalized sound system |
| 01/03/2002 | US20020001389 Acoustic talker localization |
| 01/03/2002 | US20020000831 Modular software definable pre-amplifier |
| 01/03/2002 | DE10030548A1 Telefonieren und Freisprechen für schnurlose Endgeräte mit Echokompensation Speakerphone calls and wireless terminals with echo cancellation |
| 01/02/2002 | EP1168885A2 Speaker system comprising a means for selecting a specific speaker in order to transmit an audible message to a specific location |
| 01/02/2002 | EP1168883A2 Modular software definable pre-amplifier |
| 01/02/2002 | EP1168800A2 Telephony and hands-free for wireless terminals with echo compensation |
| 01/02/2002 | EP1166544A1 Interference canceling method and apparatus |
| 01/02/2002 | CN1329453A Telephony and hand-free speed of wireless terminal equipment with echo compensation |
| 01/01/2002 | US6336219 Audiovisual reproduction system |
| 12/27/2001 | US20010055985 Telephoning and hands-free speech for cordless final apparatus with echo compensation |
| 12/27/2001 | US20010055475 Audio and video recording and reproduction apparatus |
| 12/27/2001 | US20010055397 Parametric virtual speaker and surround-sound system |
| 12/27/2001 | US20010055059 Teleconferencing system, camera controller for a teleconferencing system, and camera control method for a teleconferencing system |
| 12/26/2001 | CN1328762A Acoustic device |
| 12/23/2001 | CA2345187A1 Addressable speaker system |
| 12/20/2001 | WO2001097558A2 Fixed polar-pattern-based adaptive directionality systems |
| 12/20/2001 | WO2001041499A3 Method and device for improving communication in a vehicle |
| 12/20/2001 | US20010053231 Audio speaker system for personal computer |
| 12/20/2001 | US20010052813 Controlled phase-canceling circuits/systems |
| 12/19/2001 | EP1163824A1 Intelligent speaker training using microphone feedback and pre-loaded templates |
| 12/19/2001 | EP1163787A2 Echo suppression device and method for performing the same |
| 12/19/2001 | EP0995336B1 Method and apparatus for formatting the digital audio signal for use of the sound reproduction |
| 12/19/2001 | EP0818122B1 Improvements in or relating to loudspeakers |
| 12/19/2001 | EP0706732B1 Short range inductively coupled communication system employing time variant modulation |
| 12/19/2001 | EP0668007B1 Mobile radiotelephone set with handsfree device |
| 12/19/2001 | CN1327704A Speaker device |
| 12/18/2001 | US6332029 Acoustic device |
| 12/13/2001 | US20010050995 Audio system |
| 12/12/2001 | EP1161852A2 Method and device for receiving and treating audiosignals in surroundings affected by noise |
| 12/11/2001 | US6329908 Addressable speaker system |
| 12/06/2001 | DE10025496A1 Audio system has control device that generates control signals based on interference signals extracted from signals output by microphone, and switches at least one tweeter of loudspeaker system as microphone |
| 12/05/2001 | EP1160772A2 Multisensor based acoustic signal processing |
| 12/05/2001 | EP1159853A1 Method for shaping the spatial reception amplification characteristic of a converter arrangement and converter arrangement |
| 12/05/2001 | CN1325605A Microphone array with high directivity |
| 12/05/2001 | CN1325183A Electronic apparatus comprising an audio-frequency amplifier and method for controlling said electronic apparatus |
| 12/05/2001 | CN1324740A Built-in device of vehicles, automotive guidance system and monitoring apparatus |
| 12/04/2001 | US6327370 Hearing aid having plural microphones and a microphone switching system |