| Patents for H04R 3 - Circuits for transducers (18,190) |
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| 09/14/2004 | US6792120 Audio signal enhancement and amplification system |
| 09/14/2004 | US6792118 Computation of multi-sensor time delays |
| 09/14/2004 | US6792115 Apparatus for generating harmonics in an audio signal |
| 09/10/2004 | WO2004077402A1 Dip filter frequency characteristic decision method |
| 09/10/2004 | WO2004077401A1 Dip filter frequency characteristic decision method |
| 09/10/2004 | WO2004077090A1 Method for detection of own voice activity in a communication device |
| 09/09/2004 | US20040175006 Microphone array, method and apparatus for forming constant directivity beams using the same, and method and apparatus for estimating acoustic source direction using the same |
| 09/09/2004 | US20040175001 Circuit and program for processing multichannel audio signals and apparatus for reproducing same |
| 09/09/2004 | US20040174991 Multi-channel echo cancel method, multi-channel sound transfer method, stereo echo canceller, stereo sound transfer apparatus and transfer function calculation apparatus |
| 09/09/2004 | US20040174988 Method and apparatus for active reduction of speakerphone singing |
| 09/09/2004 | DE10307917A1 Subwoofer with dynamic push-pull drive, has two acoustically-coupled drive units fed with original and differentiated sound signals |
| 09/09/2004 | DE10307182A1 Verfahren und Vorrichtung zur Prüfung von Luftgeräuschen eines Kraftfahrzeugs Method and apparatus for testing air noises of a motor vehicle |
| 09/08/2004 | EP1455554A2 Circuit and program for processing multichannel audio signals and apparatus for reproducing same |
| 09/08/2004 | EP1455552A2 Microphone array, method and apparatus for forming constant directivity beams using the same, and method and apparatus for estimating acoustic source direction using the same |
| 09/08/2004 | EP1183911B1 Virtual multichannel speaker system |
| 09/08/2004 | EP1057291A4 System and method for factoring a merged wave field into independent components |
| 09/08/2004 | CN2640176Y Three-line type line controlled microphone |
| 09/08/2004 | CN1166160C Arrangement for suppressing interfering component of input signal |
| 09/07/2004 | US6788791 Delay network microphones with harmonic nesting |
| 09/07/2004 | US6788789 Phase conversion surround circuitry |
| 09/02/2004 | WO2004075602A1 Electronic driving circuit for directing an audio signal selectively to one of two speakers |
| 09/02/2004 | WO2004075601A1 Sound beam loudspeaker system |
| 09/02/2004 | WO2004021686A3 Telecommunication terminal comprising a memory for storing acoustic effect data |
| 09/02/2004 | WO2004015860A3 Ring triggered mute |
| 09/02/2004 | US20040170293 Vehicle accessory microphone |
| 09/02/2004 | US20040170289 Audio conference system with quality-improving features by compensating sensitivities microphones and the method thereof |
| 09/02/2004 | US20040170284 Sound reinforcement system having an echo suppressor and loudspeaker beamformer |
| 09/02/2004 | US20040170283 Howling control device and howling control method |
| 09/02/2004 | US20040168565 Method and apparatus for reproducing digital data in a portable device |
| 09/01/2004 | EP1453351A2 Driving system and method of driving loads |
| 09/01/2004 | EP1453349A2 Self-calibration of a microphone array |
| 09/01/2004 | EP1453348A1 Self-calibration of microphone arrays |
| 09/01/2004 | EP1452067A2 Directional sound acquisition |
| 09/01/2004 | CN1525792A Non-microphone voice transmission device |
| 09/01/2004 | CN1525789A Array driving system and method of driving loads |
| 09/01/2004 | CN1165203C Anti-noise-electret pick-up |
| 08/26/2004 | US20040167777 System for suppressing wind noise |
| 08/26/2004 | US20040165736 Method and apparatus for suppressing wind noise |
| 08/26/2004 | US20040165735 Self-calibration of array microphones |
| 08/25/2004 | EP1450577A1 Electronic driving circuit for directing an audio signal selectively to one of two speakers |
| 08/25/2004 | EP1450504A1 Parameter display controller for an acoustic signal processing apparatus |
| 08/25/2004 | EP1450354A1 System for suppressing wind noise |
| 08/25/2004 | EP1450353A1 System for suppressing wind noise |
| 08/25/2004 | EP1450150A2 Procedure and device for testing the air noise of a motor vehicle |
| 08/25/2004 | EP1449404A1 A high efficiency driver for miniature loudspeakers |
| 08/25/2004 | EP1449202A1 Audio-based method and apparatus for controlling operation of an appliance |
| 08/25/2004 | EP1449200A1 Apparatus for focussing ultrasonic acoustical energy within a liquid stream |
| 08/25/2004 | EP1110427B1 Low-frequency audio enhancement system |
| 08/25/2004 | CN2636357Y Mixer |
| 08/25/2004 | CN1523571A Parameter display controller for an acoustic signal processing apparatus |
| 08/24/2004 | US6782111 Multiple voicecoil and driver transducing |
| 08/24/2004 | US6782106 Apparatus and method for transmitting sound |
| 08/21/2004 | CA2458427A1 System for suppressing wind noise |
| 08/19/2004 | WO2004071130A1 Sound collecting method and sound collecting device |
| 08/19/2004 | WO2004047482A3 A high intensity directional electroacoustic sound generating system for communications targeting |
| 08/19/2004 | US20040161122 Apparatus for electric to acoustic conversion |
| 08/19/2004 | US20040161121 Adaptive beamforming method and apparatus using feedback structure |
| 08/19/2004 | US20040161120 Device and method for detecting wind noise |
| 08/19/2004 | US20040161117 Method for at least two audio signals |
| 08/19/2004 | US20040160531 Method for switching signal input based on device capability |
| 08/19/2004 | US20040160344 Robust system for transmitting and receiving map data |
| 08/19/2004 | DE10360272A1 Lautsprecher Speaker |
| 08/18/2004 | EP1448016A1 Device and method for detecting wind noise |
| 08/18/2004 | EP1446874A2 Microphone-tailored equalizing system |
| 08/18/2004 | EP1044583B1 Means for bass enhancement in an audio system |
| 08/18/2004 | CN2634768Y Earphone and speaker switching circuit based no integrated circuit in portable information device |
| 08/18/2004 | CN2634767Y Warning sound mixed electronic alarm |
| 08/18/2004 | CN1521944A Sound correction system, sound correction method and sound correction apparatus |
| 08/18/2004 | CN1521054A Vocal sound input apparatus for automotive vehicle |
| 08/18/2004 | CN1162837C Speech voice control system having microphone array |
| 08/17/2004 | US6778966 Segmented mapping converter system and method |
| 08/17/2004 | US6778963 Speech recognition system for car navigation and microphone |
| 08/17/2004 | US6778814 Wireless microphone apparatus and transmitter device for a wireless microphone |
| 08/17/2004 | US6778673 Tunable active sound absorbers |
| 08/17/2004 | US6776352 Apparatus for controllably focusing ultrasonic acoustical energy within a liquid stream |
| 08/12/2004 | WO2004068900A1 Speaker unit and voice output device |
| 08/12/2004 | WO2004068897A1 Speaker system |
| 08/12/2004 | WO2004023657A3 Method and apparatus for improving characteristics of acoustic and vibration transducers |
| 08/12/2004 | US20040158460 Device and method for operating voice-enhancement systems in motor vehicles |
| 08/12/2004 | US20040156520 Miniature digital transducer with reduced number of external terminals |
| 08/12/2004 | US20040156518 Speaker system |
| 08/11/2004 | EP1445979A2 Speaker system with a main and a subordinate speaker |
| 08/11/2004 | EP1445761A1 Apparatus and method for operating voice controlled systems in vehicles |
| 08/11/2004 | EP1342316B1 Playback device for audio signals that are transmitted over potentially disturbed channels |
| 08/11/2004 | CN2632972Y Automatic coding analog wave loudspeaker frequency divider |
| 08/10/2004 | US6775387 Three-step ramped reference to reduce popping noises on audio circuit |
| 08/10/2004 | US6775386 Microphone attached remote controller |
| 08/10/2004 | US6775385 Loudspeaker frequency distribution and adjusting circuit |
| 08/10/2004 | US6774934 Signal localization arrangement |
| 08/10/2004 | US6774684 Circuits and methods for controlling transients during audio device power-up and power-down, and systems using the same |
| 08/05/2004 | WO2004066673A1 Set-up method for array-type sound system |
| 08/05/2004 | US20040151339 Speaker |
| 08/05/2004 | US20040151328 Sound correction system, recording medium on which a sound correction program is recorded, sound correction method and sound correction apparatus |
| 08/05/2004 | US20040151325 Method and apparatus to create a sound field |
| 08/04/2004 | EP1443798A2 Real-ear zoom hearing device |
| 08/04/2004 | EP1442543A2 Apparatus and method of controlling signal levels |
| 08/04/2004 | EP0958710B1 Audio system comprising audio signal processing circuit |
| 08/04/2004 | CN2631171Y Blutooth hand-free receiver module structure |
| 08/04/2004 | CN2631170Y Control device for wireless microphone receiver |
| 08/04/2004 | CN2631169Y Apparatus for eliminating contact noise of microphone |