| Patents for H04R 3 - Circuits for transducers (18,190) | 
|---|
| 01/29/2003 | EP1279316A2 Infra bass | 
| 01/23/2003 | WO2003007604A2 A method and apparatus for performing real-time storage of ultrasound video image information | 
| 01/23/2003 | WO2003007500A1 Multi-channel echo cancel method, multi-channel sound transfer method, stereo echo canceller, stereo sound transfer apparatus, and transfer function calculation apparatus | 
| 01/23/2003 | US20030016835 Adaptive close-talking differential microphone array | 
| 01/23/2003 | US20030016588 Method for directional location and locating system | 
| 01/22/2003 | EP1278398A2 Distributed audio network using networked computing devices | 
| 01/22/2003 | EP1278396A2 Howling detecting and suppressing apparatus, method and computer program product | 
| 01/22/2003 | EP1278395A2 Second-order adaptive differential microphone array | 
| 01/22/2003 | EP1277372A1 Reception system for multisensor antenna | 
| 01/22/2003 | EP0972426B1 Apparatus and method for bass enhancement | 
| 01/22/2003 | CN1392687A Noise silencing method and device | 
| 01/21/2003 | US6510224 Enhancement of near-end voice signals in an echo suppression system | 
| 01/16/2003 | US20030014486 Distributed audio network using networked computing devices | 
| 01/16/2003 | US20030012388 Howling detecting and suppressing apparatus, method and computer program product | 
| 01/15/2003 | EP1275272A1 Multi-channel surround sound mastering and reproduction techniques that preserve spatial harmonics in three dimensions | 
| 01/15/2003 | EP1275267A2 A directional microphone assembly | 
| 01/15/2003 | EP1274348A2 Systems and methods for reducing secondary hot spots in a phased array focused ultrasound system | 
| 01/15/2003 | CN2531594Y Hands-free receiver with extended function module | 
| 01/14/2003 | US6507659 Microphone apparatus for producing signals for surround reproduction | 
| 01/14/2003 | US6506154 Systems and methods for controlling a phased array focused ultrasound system | 
| 01/09/2003 | WO2003003789A2 Method and apparatus for minimizing latency in digital signal processing systems | 
| 01/09/2003 | WO2003003572A1 Volume control in a communication device interface unit | 
| 01/09/2003 | WO2003003349A1 Method for noise reduction and microphone array for performing noise reduction | 
| 01/09/2003 | WO2001072085A3 Directional processing for multi-microphone system | 
| 01/09/2003 | US20030009329 Directionally sensitive audio pickup system with display of pickup area and/or interference source | 
| 01/09/2003 | US20030007650 Capacitor microphone | 
| 01/09/2003 | CA2451999A1 Method and apparatus for minimizing latency in digital signal processing systems | 
| 01/08/2003 | EP1273100A1 Balanced circuit arrangement | 
| 01/08/2003 | EP1273002A2 Rhythmic apparatus, rhythmic accompaniment method and electronic transducer | 
| 01/08/2003 | CN1390432A Anti-noise pickup | 
| 01/08/2003 | CN1390430A Loudspeaker device | 
| 01/08/2003 | CN1390079A Loudspeaker voltage doubler circuit | 
| 01/07/2003 | US6504937 Amplifier circuit for electret microphone with enhanced performance | 
| 01/07/2003 | US6504926 User control system for internet phone quality | 
| 01/03/2003 | WO2003001843A2 Variable multi-dimensional apodization control for ultrasonic transducers | 
| 01/03/2003 | WO2002025992A3 Loudspeaker driver | 
| 01/03/2003 | WO2001087009A3 Gas flow sensor, speaker system and microphone | 
| 01/02/2003 | US20030004732 Method, apparatus, and program for envelope generation, audio compression, and audio expansion | 
| 01/02/2003 | US20030002694 Crossover filters and method | 
| 01/02/2003 | US20030002693 Audio signal processing | 
| 01/02/2003 | US20030002688 Volume regulating and monitoring system | 
| 01/02/2003 | US20030002683 Voice-to-remaining audio (VRA) interactive center channel downmix | 
| 01/02/2003 | US20030002590 Noise canceling method and apparatus | 
| 01/02/2003 | EP1272004A2 Audio signal processing | 
| 01/02/2003 | EP1269624A2 System and method of producing direct audio from a power supply | 
| 01/02/2003 | EP1269576A1 Method for providing the transmission characteristics of a microphone arrangement and microphone arrangement | 
| 01/01/2003 | CN1388956A Multi-device audio-video with common echo canceling | 
| 12/27/2002 | WO2002104070A1 Device for monitoring musical performances and/or audio signals from video games or similar | 
| 12/27/2002 | WO2002104068A1 Sound reproducing system | 
| 12/27/2002 | WO2002104067A2 Systems and methods for sensing an acoustic signal using microelectromechanical systems technology | 
| 12/27/2002 | WO2002082422A3 Active noise cancelling headset and devices with selective noise suppression | 
| 12/27/2002 | WO2001076319A3 Method and apparatus for voice signal extraction | 
| 12/27/2002 | CA2455390A1 Device for monitoring musical performances and/or audio signals from video games or similar | 
| 12/26/2002 | US20020198455 Variable multi-dimensional apodization control for ultrasonic transducers | 
| 12/26/2002 | US20020196951 System for automatically performing a frequency response equalization tuning on speaker of electronic device | 
| 12/26/2002 | US20020196950 Method and apparatus for treating an audio signal | 
| 12/26/2002 | US20020196078 Low pass filter for output of D-class amplifier | 
| 12/25/2002 | CN1387698A Multiple driver, resonantly-coupled loudspeaker | 
| 12/25/2002 | CN1387387A Oscillation preventing circuit | 
| 12/24/2002 | US6498960 Receiver for digital audio broadcast | 
| 12/24/2002 | US6498859 Microphone mount | 
| 12/24/2002 | US6498853 Echo-cancelling optical microphone | 
| 12/19/2002 | WO2002101728A1 Method and system for suppressing echoes and noises in environments under variable acoustic and highly fedback conditions | 
| 12/19/2002 | WO2002100287A2 Dental treatment noise suppression | 
| 12/19/2002 | WO2002076143A8 Solid angle cross-talk cancellation for beamforming arrays | 
| 12/19/2002 | US20020193130 Noise suppression for a wireless communication device | 
| 12/19/2002 | US20020191802 Systems and methods for sensing an acoustic signal using microelectromechanical systems technology | 
| 12/19/2002 | DE10124699C1 Schaltungsanordnung zur Verbesserung der Verständlichkeit von Sprache enthaltenden Audiosignalen Circuit arrangement for improving the intelligibility of speech audio signals containing | 
| 12/18/2002 | EP1266538A1 Spatial sound steering system | 
| 12/18/2002 | EP1266467A1 Installation with piezoelectric element for equipping a structure and piezoelectric element for same | 
| 12/18/2002 | CN2527046Y Power supply module for multimedia loud-speaker | 
| 12/17/2002 | US6496586 Thin Loudspeaker | 
| 12/17/2002 | US6496581 Coupled acoustic echo cancellation system | 
| 12/12/2002 | US20020186855 Microphone | 
| 12/11/2002 | CN1384603A Switchable voltage follower and bridge driving circuit unit with the follower | 
| 12/05/2002 | WO2002098113A1 Self-configuring communication device interface unit | 
| 12/05/2002 | US20020181723 Robot and controlling method of the same | 
| 12/05/2002 | US20020181720 Method for analyzing an acoustical environment and a system to do so | 
| 12/05/2002 | US20020181716 Audio reproduction apparatus | 
| 12/05/2002 | US20020180630 Electronic volume circuit | 
| 12/05/2002 | DE10120108A1 Method for equalizing a roll-off compensating filter in a stereo receiver with a stereo matrix feeds signals to inputs/outputs and a multiplex signal to the stereo matrix with a definite test signal. | 
| 12/05/2002 | CA2448669A1 Detecting voiced and unvoiced speech using both acoustic and nonacoustic sensors | 
| 12/04/2002 | EP1263262A2 Oscillation prevention circuit | 
| 12/04/2002 | EP1261962A1 A method of improving the audibility of sound from a loudspeaker located close to an ear | 
| 12/04/2002 | CN2524464Y Integrated sound sensing controller | 
| 11/28/2002 | WO2002095975A1 Echo processing apparatus | 
| 11/28/2002 | WO2002095936A1 Audio output amplifier | 
| 11/28/2002 | WO2002095935A1 Audio output amplifier | 
| 11/28/2002 | US20020176589 Noise reduction method with self-controlling interference frequency | 
| 11/28/2002 | US20020176588 Oscillation prevention circuit | 
| 11/28/2002 | US20020176587 Method of generating an electrical output signal and acoustical/electrical conversion system | 
| 11/28/2002 | US20020176556 Intercom system for mansion/apartment house | 
| 11/28/2002 | US20020176004 Video camera | 
| 11/28/2002 | DE10209807A1 Two-way intercom system for living accommodation and lodgings, each domicile-related main station has speech circuit with load impedance connected to common bus | 
| 11/27/2002 | EP1261233A1 An anti-noise pick-up | 
| 11/26/2002 | US6487529 Audio processing device, receiver and filtering method for filtering a useful signal and restoring it in the presence of ambient noise | 
| 11/22/2002 | CA2386004A1 Oscillation prevention circuit | 
| 11/21/2002 | WO2002093973A1 Apparatus for electric to acoustic conversion | 
| 11/21/2002 | WO2002093895A1 Method for adaptive control of multichannel acoustic echo cancellation system and device therefor | 
| 11/21/2002 | WO2002093773A1 Parametric virtual speaker and surround-sound system |