| Patents for H04R 3 - Circuits for transducers (18,190) | 
|---|
| 05/01/2003 | US20030079600 Arrangement of a rythmic apparatus with a vehicle sound apparatus, rhythmic accompaniment method and electronic transducer | 
| 04/30/2003 | CN1414817A Digital sound mixing apparatus | 
| 04/29/2003 | US6556687 Super-directional loudspeaker using ultrasonic wave | 
| 04/29/2003 | US6556682 Method for cancelling multi-channel acoustic echo and multi-channel acoustic echo canceller | 
| 04/29/2003 | US6555857 Suitable for use to connect electric condenser microphones | 
| 04/24/2003 | WO2003034781A2 Bass frequency amplifying apparatus | 
| 04/24/2003 | WO2003034780A2 Signal processing device for acoustic transducer array | 
| 04/24/2003 | US20030078073 Speaker module connectable to an earphone jack of mobile phone and method for using same | 
| 04/23/2003 | EP1304902A1 Method and device for noise suppression in a redundant acoustic signal | 
| 04/23/2003 | EP1304016A2 A/d converter with integrated biasing for a microphone | 
| 04/23/2003 | EP1013141B1 Method and device for reproducing a stereophonic audiosignal | 
| 04/23/2003 | EP0734621B1 A wireless digital communication system, a radio apparatus and a digital speaker | 
| 04/23/2003 | CN1106748C Apparatus and method for providing telephone user with control of threshold volume at which user's voice will take control | 
| 04/23/2003 | CN1106713C A audio A/D converter using frequency modulation | 
| 04/23/2003 | CN1106209C Electronic gaming device capable of generating pseudo-stereophonic sound | 
| 04/17/2003 | WO2003032683A1 Device for presenting acoustical and vibratory stimuli and method of calibration | 
| 04/17/2003 | WO2003032680A2 Transponder with a changeable circuit configuration | 
| 04/17/2003 | US20030072464 Spectral enhancement using digital frequency warping | 
| 04/17/2003 | US20030072462 Loudspeaker with large displacement motional feedback | 
| 04/17/2003 | US20030072461 Ultra-directional microphones | 
| 04/17/2003 | US20030072460 Directional sound acquisition | 
| 04/17/2003 | US20030070537 Musical tone generation control system, musical tone generation control method, and program for implementing the method | 
| 04/16/2003 | EP1303163A1 Audio reproduction apparatus | 
| 04/16/2003 | EP1303094A2 Noise canceling method and apparatus | 
| 04/16/2003 | CN2545781Y Prime module adapter structure of amplifier | 
| 04/16/2003 | CN1106068C Dual action automatic sound level controller | 
| 04/16/2003 | CA2408340A1 Position sensor for a loudspeaker | 
| 04/16/2003 | CA2408045A1 Loudspeaker with large displacement motional feedback | 
| 04/15/2003 | US6549630 Signal expander with discrimination between close and distant acoustic source | 
| 04/15/2003 | US6549629 DVE system with normalized selection | 
| 04/15/2003 | US6549627 Generating calibration signals for an adaptive beamformer | 
| 04/15/2003 | US6549586 System and method for dual microphone signal noise reduction using spectral subtraction | 
| 04/10/2003 | WO2003030589A2 Sound reproduction systems | 
| 04/10/2003 | WO2003030387A1 Apparatus and method for level-dependent companding for wireless audio noise reduction | 
| 04/10/2003 | WO2003019846A3 Dynamic carrier system for parametric arrays | 
| 04/10/2003 | WO2002041668A3 A method of and apparatus for producing apparent multidimensional sound | 
| 04/10/2003 | US20030068060 Microphone assembly for vehicular installation | 
| 04/10/2003 | US20030067841 Digital signal demodulator calibration system and method for optical hydrophones | 
| 04/10/2003 | US20030067382 Transponder with a changeable circuit configuration | 
| 04/09/2003 | EP1300963A1 Echo processing apparatus | 
| 04/09/2003 | CN1409939A Parametric loudspeaker with improved phase characteristics | 
| 04/09/2003 | CN1409578A Module low voice array | 
| 04/09/2003 | CN1409568A Sound feedback preventive circuit of honeycomb type loudspeaker | 
| 04/09/2003 | CN1409524A Complex circuit safety digital frequency mixing system | 
| 04/09/2003 | CN1408582A Regulation-free contactless electric horn of automobile | 
| 04/08/2003 | US6546099 Arrangement for suppressing an interfering component of an input signal | 
| 04/08/2003 | US6545699 Teleconferencing system, camera controller for a teleconferencing system, and camera control method for a teleconferencing system | 
| 04/07/2003 | WO2001076063A2 Method for processing an input signal for producing an output signal and an application of said method in hearing aids and devices | 
| 04/07/2003 | CA2425180A1 Method for processing an input signal for producing an output signal and an application of said method in hearing aids and devices | 
| 04/03/2003 | WO2003028406A2 Method and apparatus for determining a nonlinear response function for a loudspeaker | 
| 04/03/2003 | WO2003028405A1 Method and device for controlling the bass reproduction of audio signals in electroacoustic transducers | 
| 04/03/2003 | WO2003028006A2 Selective sound enhancement | 
| 04/03/2003 | US20030065513 Voice input and output apparatus | 
| 04/03/2003 | US20030063761 System for distributing a signal between loudspeaker drivers | 
| 04/03/2003 | US20030063758 Microphone arrays for high resolution sound field recording | 
| 04/03/2003 | US20030063024 Apparatus and method for level-dependent companding for wireless audio noise reduction | 
| 04/02/2003 | EP1298960A2 Digital acoustic reproducing apparatus, acoustic apparatus and accoustic reproducing system | 
| 04/02/2003 | EP1298794A2 Pop sound reduction circuit and voice output amplification device | 
| 04/02/2003 | EP1297721A2 Gas flow sensor, speaker system and microphone | 
| 04/02/2003 | EP0972345B1 An audio a/d converter using frequency modulation | 
| 04/02/2003 | EP0929825B1 Two-dimensional array transducer and beamformer | 
| 04/01/2003 | US6540661 Arrangement for coupling of a driver to a coupling site of the ossicular chain | 
| 03/27/2003 | WO2003026350A2 Audio distributor | 
| 03/27/2003 | WO2003026343A2 Controller interface for directional sound system | 
| 03/27/2003 | WO2003026242A1 A digital implementation of multi-channel demodulators | 
| 03/27/2003 | WO2003026174A2 Digital audio system | 
| 03/27/2003 | WO2003026162A2 Telephony control in the flight deck | 
| 03/27/2003 | WO2003025962A1 Visual indication of uninstalled control panel functions | 
| 03/27/2003 | WO2003025905A1 Active noise filtering for voice communication systems | 
| 03/27/2003 | WO2003025617A2 Annunciation of the distance to a target position in a gps landing system | 
| 03/27/2003 | WO2003025508A2 Station identification for a local area augmentation system on a visual display | 
| 03/27/2003 | US20030061032 Selective sound enhancement | 
| 03/27/2003 | US20030059072 Audio-cell | 
| 03/27/2003 | US20030059063 Amplifier with limiter | 
| 03/27/2003 | US20030059062 Circuit to prevent acoustic feedback for a cellular speakerphone | 
| 03/27/2003 | US20030059060 Microphone | 
| 03/27/2003 | US20030059056 Method and apparatus for determining a nonlinear response function for a loudspeaker | 
| 03/27/2003 | US20030058040 Pop sound reduction circuit and voice output amplification device | 
| 03/26/2003 | EP1296534A2 Modular bass array | 
| 03/26/2003 | EP1296450A2 Amplifier with limiter | 
| 03/26/2003 | EP1295507A2 Method and apparatus for voice signal extraction | 
| 03/26/2003 | CN1406100A Voice-frequency signal processing | 
| 03/20/2003 | WO2003024152A2 Listening device | 
| 03/20/2003 | WO2003024150A1 Passive and active escapement for sound resonance | 
| 03/20/2003 | WO2003024149A1 Miniature speaker with integrated signal processing electronics | 
| 03/20/2003 | WO2003023418A2 Potential fixing device and potential fixing method | 
| 03/20/2003 | WO2003023417A1 Sensor capacity sensing apparatus and sensor capacity sensing method | 
| 03/20/2003 | WO2001087011A3 Interference suppression techniques | 
| 03/20/2003 | US20030056221 Digital implementation of multi-channel demodulators | 
| 03/20/2003 | US20030055635 Segmented mapping converter system and method | 
| 03/20/2003 | US20030055519 Digital audio system | 
| 03/20/2003 | US20030055518 Digital mixing system with double arrangement for fail safe | 
| 03/20/2003 | US20030055517 Digital acoustic reproducing apparatus, acoustic apparatus and acoustic reproducing system | 
| 03/20/2003 | US20030054817 Telephony control in the flight deck | 
| 03/20/2003 | US20030053648 Modular bass arraying | 
| 03/20/2003 | US20030053647 Feedback cancellation in a hearing aid with reduced sensitivity to low-frequency tonal inputs | 
| 03/20/2003 | US20030053646 Listening device | 
| 03/20/2003 | US20030053637 Audio distributor | 
| 03/20/2003 | US20030053636 Active noise filtering for voice communication systems | 
| 03/20/2003 | US20030052816 Annunciation of the distance to a target position in a global positioning system landing system |