| Patents for H04R 3 - Circuits for transducers (18,190) |
|---|
| 09/26/2001 | CN1071986C Diaphragm for use with an electro-acoustic transducer and method of producing the same |
| 09/20/2001 | WO2001069968A2 Adaptive microphone matching in multi-microphone directional system |
| 09/20/2001 | WO2001069779A1 System and method of producing direct audio from a power supply |
| 09/20/2001 | US20010022835 Speaker apparatus |
| 09/20/2001 | DE10049355A1 Filter for microphone, includes pair of transistors of which one is connected to output of microphone through capacitor and another to constant current source at current and control electrode ends |
| 09/19/2001 | EP1135002A2 Speaker driving circuit |
| 09/19/2001 | EP1134728A1 Regeneration of the low frequency component of a speech signal from the narrow band signal |
| 09/19/2001 | EP1133899A1 Binaural signal processing techniques |
| 09/19/2001 | EP1133896A1 Environment adaptable loudspeaker |
| 09/19/2001 | EP1133895A1 Microphone array with high directivity |
| 09/19/2001 | EP1133768A1 Speech recognition apparatus and consumer electronics system |
| 09/19/2001 | CN1313718A Device for shaping signal, especially speech signal |
| 09/19/2001 | CN1313674A Loudspeaker driving circuit |
| 09/13/2001 | WO2001067807A2 Electro-acoustic transducer for eliminating interfering noises |
| 09/13/2001 | WO2001067433A1 A method of improving the audibility of sound from a loudspeaker located close to an ear |
| 09/13/2001 | US20010021188 Connection setting apparatus |
| 09/12/2001 | EP1133213A2 An audio A/D converter using frequency modulation |
| 09/12/2001 | EP1133211A2 Information apparatus having speakers |
| 09/12/2001 | CN1312602A Connector, multi-path audio-frequency system, electronic apparatus and cable for connection |
| 09/07/2001 | WO2001065867A2 Mobile communication terminal and car mounted electronic device |
| 09/06/2001 | US20010019516 Speaker direction detection circuit and speaker direction detection method used in this circuit |
| 09/05/2001 | EP1129601A1 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 |
| 09/05/2001 | EP1129600A1 Method for in-situ measuring and in-situ correcting or adjusting a signal process in a hearing aid with a reference signal processor |
| 09/05/2001 | EP0890291B1 Process and arrangement for converting an acoustic signal to an electrical signal |
| 09/04/2001 | US6285770 Noticeboards incorporating loudspeakers |
| 09/04/2001 | US6285769 Force balance microphone |
| 09/04/2001 | US6285767 Low-frequency audio enhancement system |
| 08/30/2001 | WO2001063969A1 An anti-noise pick-up |
| 08/30/2001 | WO2001026416A3 High performance audio transmission channel |
| 08/30/2001 | US20010018621 Multimedia Computer Speaker System with Bridge-Coupled Subwoofer |
| 08/30/2001 | US20010017924 Loudspeakers with panel-form acoustic radiating elements |
| 08/30/2001 | US20010017921 Sound field correcting method in audio system |
| 08/30/2001 | DE10052196A1 Mikrofoneinheit Microphone unit |
| 08/30/2001 | CA2399204A1 An anti-noise pick-up |
| 08/29/2001 | EP1127476A1 Point source speaker system |
| 08/29/2001 | CN2445536Y Single-plug earphone with multi-earphone |
| 08/29/2001 | CN1310575A Loudspeaker |
| 08/28/2001 | US6282296 Audio reproducing apparatus |
| 08/23/2001 | WO2001062044A1 Method and device for comparing signals to control transducers and transducer control system |
| 08/23/2001 | WO2001062041A1 Sub-woofer system |
| 08/23/2001 | US20010016048 Audio reproduction arrangement and telephone terminal |
| 08/23/2001 | US20010016047 Automatic sound field correcting system |
| 08/23/2001 | US20010016046 Automatic sound field correcting system and a sound field correcting method |
| 08/23/2001 | US20010016045 Method of correcting sound field in an audio system |
| 08/23/2001 | US20010016020 System and method for dual microphone signal noise reduction using spectral subtraction |
| 08/23/2001 | DE10007476A1 Filter circuit for stereo transmitter, has active all-pass filter connected to output of low pass filter |
| 08/22/2001 | EP1126746A2 Automatic sound field correcting system and a sound field correcting method |
| 08/22/2001 | EP1126745A2 Sound field correcting method in audio system |
| 08/22/2001 | EP1126744A2 Automatic sound field correcting system |
| 08/22/2001 | EP1126743A2 Method of correcting sound field in an audio system |
| 08/22/2001 | EP1126687A2 Method for coordinated echo and/or noise reduction |
| 08/22/2001 | EP0671114B1 Hearing aid compensating for acoustic feedback |
| 08/16/2001 | WO2001060112A2 Method of generating an electrical output signal and acoustical/electrical conversion system |
| 08/16/2001 | WO2001059928A1 Balanced circuit arrangement |
| 08/16/2001 | WO2001008442A3 Method and agc device for controlling the amplification of a microphone with an integrated amplifier with a working point which can be adjusted by external wiring |
| 08/16/2001 | EP1123637A2 Public address apparatus |
| 08/16/2001 | EP1123634A1 Parametric loudspeaker with electro-acoustical diaphragm transducer |
| 08/15/2001 | CN1308833A Audio signal controller and reproducing device comprising the same |
| 08/14/2001 | US6275593 Apparatus and methods for the harmonic enhancement of electronic audio signals |
| 08/09/2001 | WO2001058209A1 Microphone arrays for high resolution sound field recording |
| 08/09/2001 | DE10003308A1 Noise source detection and location in conveyor belts involves using mobile measurement device(s) not attached to belt to detect noise levels as it passes individual belt components |
| 08/08/2001 | EP1122973A2 Digital pulse-width-modulation generator |
| 08/08/2001 | EP1121768A1 Method and device for developing a virtual speaker distant from the sound source |
| 08/08/2001 | EP0815641B1 Dual action automatic sound level control |
| 08/07/2001 | US6271780 Gain ranging analog-to-digital converter with error correction |
| 08/07/2001 | CA2240026C Speaker and amplifier system |
| 08/07/2001 | CA2174159C Acoustic echo canceler |
| 08/02/2001 | WO2001056328A1 System and method for dual microphone signal noise reduction using spectral subtraction |
| 08/01/2001 | EP1008277B1 Sound pickup device, specially for a voice station |
| 07/31/2001 | US6269165 Method and apparatus for reduction of unwanted feedback |
| 07/31/2001 | US6269161 System and method for near-end talker detection by spectrum analysis |
| 07/31/2001 | US6269052 Transmitting/receiving circuit and transmitting/receiving method for a transducer |
| 07/31/2001 | US6267600 Microphone and receiver for automatic accompaniment |
| 07/26/2001 | WO2001054452A1 Electromagnetic feedback reduction in communication device |
| 07/26/2001 | WO2001054451A2 A directional microphone assembly |
| 07/26/2001 | WO2001001566A3 Method for processing an audio signal |
| 07/26/2001 | US20010009540 Portable information processing apparatus with a plurality of speakers |
| 07/25/2001 | EP1119218A1 Electromagnetic feedback reduction in communication device |
| 07/25/2001 | EP1118840A1 Echo-cancelling optical microphone |
| 07/25/2001 | EP1118247A2 Band-limited adaptive feedback canceller for hearing aids |
| 07/25/2001 | CN1305661A User adjustable volume control that accommodates hearing |
| 07/24/2001 | US6266426 Visual display means incorporating loudspeakers |
| 07/24/2001 | US6266424 Electret microphone circuit with low battery disable |
| 07/24/2001 | US6266410 Speakerphone and microphone case for the same |
| 07/19/2001 | WO2001052596A2 A method for analyzing an acoustical environment and a system to do so |
| 07/19/2001 | WO2001052437A1 Parametric audio system |
| 07/19/2001 | WO2001052242A1 Noise reduction apparatus and method |
| 07/19/2001 | WO2001022576A9 Loudspeaker frequency distribution and adjusting circuit |
| 07/19/2001 | US20010008559 Directional microphone assembly |
| 07/19/2001 | DE10000009A1 Echo signal reduction-correction procedure for telecommunication network, involves detecting quality values of each terminal based on which countermeasures for echo reduction is estimated |
| 07/19/2001 | CA2390844A1 A method for analyzing an acoustical environment and a system to do so |
| 07/18/2001 | EP1117226A2 Connection setting apparatus |
| 07/18/2001 | EP1117030A2 Multimedia device for computer |
| 07/18/2001 | EP1116961A2 Method and system for tracking human speakers |
| 07/18/2001 | CN1304597A Audio peripheral device |
| 07/18/2001 | CN1304132A Device for producing harmonic wave in audio signal |
| 07/12/2001 | WO2001050810A1 Piezoelectric film sonic emitter |
| 07/12/2001 | WO2000076266A3 Virtual multichannel speaker system |
| 07/12/2001 | WO2000011908A3 High quality wireless audio speakers |
| 07/12/2001 | US20010007591 Parametric audio system |