Patents for H04R 3 - Circuits for transducers (18,190) |
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04/09/1996 | US5506908 Directional microphone system |
04/09/1996 | US5506532 Output limiter for class-D BICMOS hearing aid output amplifier |
04/04/1996 | DE4434633A1 Woofer loudspeaker box for home use |
04/03/1996 | EP0705054A2 Sound reproduction system |
04/03/1996 | EP0704118A1 Signal amplifier system with improved echo cancellation |
04/03/1996 | EP0486679B1 Method and apparatus for adaptive audio resonant frequency filtering |
03/27/1996 | CN1031444C Apparatus for adjusting of character of radio wave |
03/21/1996 | DE19531778A1 Audio system with cable connection device e.g. for cassette device or CD player |
03/19/1996 | US5500903 Method for vectorial noise-reduction in speech, and implementation device |
03/14/1996 | WO1996008004A1 Directional ear device with adaptive bandwidth and gain control |
03/13/1996 | EP0701386A2 Speaker and drive device therefor |
03/13/1996 | EP0700622A1 An integrated video and audio signal distribution system for use on commercial aircraft and other vehicles |
03/07/1996 | WO1996007293A1 Device for controlling the volume of a car radio dependently upon the ambient noise |
03/07/1996 | WO1996007292A1 Method and apparatus for a sequential interface between an audio signal and an electro-acoustic transducer |
03/07/1996 | DE4430931A1 Einrichtung zur fahrgeräuschabhängigen Steuerung der Lautstärke eines Autoradios Means for driving noise dependent volume control of a car radio |
03/06/1996 | EP0700156A2 Beamformer using coefficient restrained adaptive filters for detecting interference signals |
03/06/1996 | EP0700155A1 Method and apparatus capable of quickly identifying an unknown system with a final error reduced |
02/28/1996 | EP0698333A1 Voice coil excursion and amplitude gain control device |
02/20/1996 | US5493620 High fidelity sound reproducing system |
02/13/1996 | US5491452 Peltier element as series noise clamp |
02/06/1996 | US5490219 Noise canceling microphone with visual feedback |
02/01/1996 | DE4447269C1 Frequency filter for multi-path loudspeaker systems with enhanced phase characteristic |
01/31/1996 | EP0694833A1 Intelligent human interface system |
01/31/1996 | EP0694246A1 A method and a coupling for reducing the harmonic distortion of a capacitive transducer |
01/31/1996 | CN1116036A Gradient directional microphone system and method thereof |
01/30/1996 | US5488258 Circuit for muting noises in a power amplifier |
01/30/1996 | CA2077894C Improved audio distribution system |
01/29/1996 | CA2151073A1 Intelligent human interface system |
01/17/1996 | EP0692923A1 Selective sound pick-up device for reflecting and noisy environment |
01/17/1996 | CN2217862Y Speech-sounds recording-playing voice-box directly connected with interface of microcomputor |
01/09/1996 | US5483599 Directional microphone system |
01/09/1996 | US5483367 Transmitting and receiving apparatus for a radio headphone |
01/03/1996 | EP0690657A2 A directional microphone system |
01/03/1996 | EP0690656A2 Long-time balancing of omni microphones |
01/03/1996 | EP0690655A2 Direction finder |
01/02/1996 | US5481617 Loudspeaker arrangement with frequency dependent amplitude regulation |
01/02/1996 | US5479813 Sensor matching through real-time output compensation |
12/31/1995 | CA2149680A1 Direction finder |
12/27/1995 | EP0689372A1 Loudspeaker with integrated capacitor |
12/27/1995 | EP0689191A2 Mobile transceiver |
12/27/1995 | CN1114097A Circuit capable of quickly controlling tone and dynamic acoustics |
12/26/1995 | US5479517 Method of estimating delay in noise-affected voice channels |
12/21/1995 | WO1995034983A1 Adaptive microphone arrangement and method for adapting to an incoming target-noise signal |
12/20/1995 | CN1113644A Frequency Q-value balancing method for electric audio system |
12/20/1995 | CN1113627A Noise-canceling differential microphone assembly |
12/19/1995 | US5477270 Distance-adaptive microphone for video camera |
12/12/1995 | US5475759 Electronic filters, hearing aids and methods |
12/07/1995 | WO1995033357A1 Process and equipment for the reproduction of sound signals, and associated control device and sound reproduction device |
12/07/1995 | DE19505435C1 Tonality evaluation system for audio signal |
12/06/1995 | EP0685133A1 Voice transmission systems with voice cancellation |
12/05/1995 | US5473702 Adaptive noise canceller |
12/05/1995 | US5473701 Adaptive microphone array |
12/05/1995 | US5473684 Noise-canceling differential microphone assembly |
11/30/1995 | WO1995028034A3 Signal amplifier system with improved echo cancellation |
11/30/1995 | DE4418360A1 Multiple direction loudspeaker |
11/30/1995 | DE4418337A1 Verfahren und Vorrichtung zur Wiedergabe von Schallsignalen sowie Steuergerät und Schallwiedergabegerät A method and apparatus for reproducing sound signals as well as the control unit and the sound reproduction device |
11/28/1995 | US5471538 Microphone apparatus |
11/23/1995 | WO1995031805A1 Multimedia personal computer with active noise reduction and piezo speakers |
11/23/1995 | WO1995028816A3 Infrared audio transmitter system |
11/22/1995 | EP0683621A2 Transmitter-receiver having ear-piece type acoustic transducing part |
11/22/1995 | EP0682801A1 A noise reduction system and device, and a mobile radio station |
11/22/1995 | EP0464222B1 Sound reproducing device |
11/22/1995 | CN1112329A Microphone of video camera |
11/21/1995 | US5469511 Method and apparatus for presentation of on-line directional sound |
11/15/1995 | EP0682436A2 Voice actuated switching system |
11/15/1995 | EP0681717A1 Battery drain reducer |
11/15/1995 | CN2212871Y Contactless electric horn |
11/14/1995 | US5467400 Solid state audio amplifier emulating a tube audio amplifier |
11/14/1995 | US5467393 Method and apparatus for volume and intelligibility control for a loudspeaker |
11/09/1995 | WO1995030221A1 Industrial headset |
11/08/1995 | EP0681366A1 Sequential amplifier |
11/07/1995 | US5463893 Sensor matching through real-time output compensation |
11/07/1995 | CA2056292C Sound volume controlling apparatus |
11/02/1995 | WO1995029479A1 Methods and apparatus for adaptive beamforming |
10/31/1995 | US5463694 Gradient directional microphone system and method therefor |
10/26/1995 | WO1995028816A2 Infrared audio transmitter system |
10/26/1995 | CA2185905A1 Infrared audio transmitter system |
10/25/1995 | EP0679044A2 Noise-canceling differential microphone assembly |
10/24/1995 | US5461676 Device for improving bass reproduction in loudspeaker system with closed housings |
10/19/1995 | WO1995028034A2 Signal amplifier system with improved echo cancellation |
10/18/1995 | EP0677978A2 Appliance for signal transmission from an amplifier to a loudspeaker |
10/18/1995 | EP0677931A2 Moise shaping of differntially encoded and compressed audiosignals |
10/17/1995 | US5459792 Audio input circuit for voice recognition |
09/28/1995 | DE4410671A1 Correction of frequency response e.g. of loudspeakers |
09/27/1995 | CN1109254A Playback system with dynamic error feedforward |
09/21/1995 | WO1995025413A1 Self-damping speaker matching device and method |
09/18/1995 | CA2144782A1 Microphone with infrared on/off switch |
09/14/1995 | DE19508368A1 Audio output equaliser and amplifier for personal computer |
09/13/1995 | EP0671114A1 Hearing aid compensating for acoustic feedback |
09/12/1995 | US5450494 Automatic volume controlling apparatus |
09/05/1995 | US5448637 Two-way communications earset |
08/30/1995 | EP0627139A4 Feedback level estimator between loudspeaker and microphone. |
08/23/1995 | EP0668007A1 Mobile radiotelephone set with handsfree device |
08/22/1995 | US5444785 Echo attaching circuit and audio device using the same |
08/22/1995 | US5444783 Automatic sound volume control device for acoustic instruments |
08/15/1995 | US5442712 Sound amplifying apparatus with automatic howl-suppressing function |
08/10/1995 | DE4403792A1 Pre-amplifier with inputs to music source and microphone |
08/08/1995 | US5440644 Audio distribution system having programmable zoning features |
08/08/1995 | US5440642 Analog noise cancellation system using digital optimizing of variable parameters |
08/02/1995 | CN1106178A Electrical circuits having noise eliminating element |