| Patents for H04R 3 - Circuits for transducers (18,190) | 
|---|
| 10/23/2003 | US20030197965 Digital audio precompensation | 
| 10/22/2003 | EP1355513A2 Enhanced Sound Processing System For Use With Sound Radiators | 
| 10/22/2003 | EP1355510A2 Loudspeaker arrangement and switching apparatus therefor | 
| 10/22/2003 | EP1355509A2 Digital audio precompensation | 
| 10/22/2003 | EP1355418A1 Audio superpositioning | 
| 10/22/2003 | EP1354401A1 Circuits and methods for controlling transients during audio device power-up and power-down, and systems using the same | 
| 10/22/2003 | CN2582309Y Hand-free receiver able to eliminate feedback voice and background echo | 
| 10/22/2003 | CN1451254A Infrabass | 
| 10/21/2003 | US6636611 Combined receiver and speaker | 
| 10/21/2003 | US6634455 Thin-wall multi-concentric sleeve speaker | 
| 10/19/2003 | CA2424157A1 Enhanced sound processing system for use with sound radiators | 
| 10/16/2003 | WO2003086016A1 Dual range horn with acoustic crossover | 
| 10/16/2003 | WO2003086014A1 Impedance converter for capacitor microphone | 
| 10/16/2003 | WO2003086009A1 Switched-geometry microphone array arrangement and method for processing outputs from a plurality of microphones | 
| 10/16/2003 | WO2003001843A3 Variable multi-dimensional apodization control for ultrasonic transducers | 
| 10/16/2003 | WO2002060122A3 Vehicle audio system | 
| 10/16/2003 | US20030194101 Audio superpositioning | 
| 10/16/2003 | US20030194099 Method and apparatus for processing microphone audio signals | 
| 10/16/2003 | US20030194098 Mid-range loudspeaker | 
| 10/15/2003 | EP1352509A1 Signal routing for reduced power consumption in a conferencing system | 
| 10/15/2003 | EP1352387A2 Systems and methods for controlling a phased array focused ultrasound system | 
| 10/15/2003 | CN1449261A Systems and methods for reducing secondary hot spots in a phased array focused ultrasound system | 
| 10/14/2003 | CA2261108C Acoustic heterodyne device and method | 
| 10/09/2003 | WO2003083828A1 Nicrophone and voice activity detection (vad) configurations for use with communication systems | 
| 10/09/2003 | WO2003036406A3 Apparatus and method of controlling signal levels | 
| 10/09/2003 | WO2002104067A3 Systems and methods for sensing an acoustic signal using microelectromechanical systems technology | 
| 10/09/2003 | CA2479758A1 Microphone and voice activity detection (vad) configurations for use with communication systems | 
| 10/08/2003 | EP1351543A2 Speaker control apparatus and speaker system | 
| 10/08/2003 | CN1447624A Automatic audio system equalization | 
| 10/02/2003 | US20030185410 Orthogonal circular microphone array system and method for detecting three-dimensional direction of sound source using the same | 
| 10/02/2003 | US20030185409 Noise reduction method | 
| 10/02/2003 | US20030185405 Modulator processing for a parametric speaker system | 
| 10/02/2003 | US20030185404 Phased array sound system | 
| 10/02/2003 | US20030185403 Method of improving the audibility of sound from a louspeaker located close to an ear | 
| 10/01/2003 | EP1349427A2 Automatic audio equalising system | 
| 10/01/2003 | EP1349419A2 Orthogonal circular microphone array system and method for detecting three-dimensional direction of sound source using the same | 
| 10/01/2003 | EP1348314A1 Directional microphone | 
| 10/01/2003 | CN1122963C Method and apparatus for measuring signal level and delay at multiple sensors | 
| 09/30/2003 | US6628793 Speaker system | 
| 09/30/2003 | US6628791 Signal derived bias supply for electrostatic loudspeakers | 
| 09/25/2003 | WO2003079725A2 Resonator device and associated circuits | 
| 09/25/2003 | WO2003079722A1 Active audio compressing in telecommunication | 
| 09/25/2003 | WO2003079721A1 Audio feedback processing system | 
| 09/25/2003 | WO2003079572A1 Parametric loudspeaker system for pre-encoded signal playback | 
| 09/25/2003 | WO2003079486A1 Beam forming array of transducers | 
| 09/25/2003 | WO2003061167A3 Digital linking of multiple microphone systems | 
| 09/25/2003 | WO2002013572A3 Method and apparatus for filtering and compressing sound signals | 
| 09/25/2003 | US20030179899 Loudspeaker with shaped sound field | 
| 09/25/2003 | US20030179891 Automatic audio system equalizing | 
| 09/25/2003 | US20030179890 Microphone array | 
| 09/24/2003 | EP1346600A2 Loudspeaker systems | 
| 09/24/2003 | EP1346552A1 A sound-based proximity detector for use in a mobile telephone apparatus | 
| 09/24/2003 | EP0801785B1 Communications headset | 
| 09/23/2003 | US6625287 Enhancing automatic noise reduction using negative output resistance | 
| 09/18/2003 | WO2003077594A1 Howling control device and howling control method | 
| 09/18/2003 | WO2003076889A1 Method and system for measuring a system's transmission quality | 
| 09/18/2003 | WO2002049211A3 Dynamic allocation of power supplied by a power supply and frequency agile spectral filtering of signals | 
| 09/18/2003 | US20030174852 Directional microphone arrangement and method for signal processing in a directional microphone arrangement | 
| 09/18/2003 | CA2447144A1 Howling control device and howling control method | 
| 09/17/2003 | EP1004222A4 A distributed stereo system | 
| 09/17/2003 | CN2574325Y Alternate audio signal playback line | 
| 09/17/2003 | CN1443432A Directional microphone arrangement and method for signal processing in directional microphone arrangement | 
| 09/17/2003 | CN1443020A Signal excitation type electric microphone system | 
| 09/16/2003 | US6621910 Method and arrangement for improving leak tolerance of an earpiece in a radio device | 
| 09/12/2003 | WO2003075610A1 Acoustic signal transducing device and method | 
| 09/12/2003 | WO2003075606A1 Loudspeaker with shaped sound field | 
| 09/12/2003 | WO2003075603A2 Digital microphone | 
| 09/11/2003 | US20030169892 Microphone-speaker apparatus | 
| 09/11/2003 | US20030169890 Audio receiving system | 
| 09/11/2003 | US20030169189 Robust system for transmitting and receiving map data | 
| 09/10/2003 | EP1343352A1 Microphone-speaker apparatus | 
| 09/10/2003 | EP1343351A1 A method and an apparatus for enhancing received desired sound signals from a desired sound source and of suppressing undesired sound signals from undesired sound sources | 
| 09/10/2003 | EP1342316A1 Playback device for audio signals that are transmitted over potentially disturbed channels | 
| 09/10/2003 | CN2572702Y Sound controlled loudspeaker with lighting | 
| 09/10/2003 | CN1442003A Method and means for receiving digital transmission comprising plurality of digital audio signals and for simultaneous reproduction of these signals as analog audio programmes | 
| 09/09/2003 | US6618485 Microphone array | 
| 09/09/2003 | US6618481 Method for improving acoustic sidetone suppression in hands-free telephones | 
| 09/09/2003 | US6617966 Compound acoustic actuator drive circuit and portable information terminal | 
| 09/04/2003 | WO2003073786A1 Multiple beam microphone array having automatic mixing processing via speech detection | 
| 09/04/2003 | WO2003025508A3 Station identification for a local area augmentation system on a visual display | 
| 09/04/2003 | WO2002074008A3 Improvements in noise cancellation | 
| 09/04/2003 | WO2002021879A3 Digital system to compensate power compression of loudspeakers | 
| 09/03/2003 | EP1341394A1 Electronic audio signal processing device | 
| 09/03/2003 | EP1341302A2 Btl amplifying system | 
| 09/03/2003 | EP1340224A1 Method for control of a unit comprising an acoustic output device | 
| 09/03/2003 | EP1133899A4 Binaural signal processing techniques | 
| 09/03/2003 | CN1440628A Interference suppression technologies | 
| 09/02/2003 | US6614911 Microphone assembly having a windscreen of high acoustic resistivity and/or hydrophobic material | 
| 08/28/2003 | WO2003071829A1 Rapidly optimized wireless microphone system and method for controlling thereof | 
| 08/28/2003 | WO2003071827A2 Compact surround-sound system | 
| 08/28/2003 | WO2003034780A3 Signal processing device for acoustic transducer array | 
| 08/28/2003 | WO2003026174A3 Digital audio system | 
| 08/28/2003 | US20030163303 Memory sharing scheme in audio post-processing | 
| 08/28/2003 | US20030161488 Audio circuit having noise cancelling function | 
| 08/28/2003 | US20030161485 Multiple beam automatic mixing microphone array processing via speech detection | 
| 08/28/2003 | US20030161484 Built-in microphone device | 
| 08/28/2003 | US20030160653 BTL amplifying system | 
| 08/27/2003 | EP1337184A1 Miniature ultrasound transducer | 
| 08/27/2003 | EP1044584A4 Mechanical acoustic crossover network and transducer therefor | 
| 08/27/2003 | CN1438819A Method and apparatus for eliminating touch noise of microphone |