| Patents for H03G 9 - Combinations of two or more types of control, e.g. gain control and tone control (1,150) |
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| 09/28/2005 | CN1674451A Dynamic equalizing technology |
| 09/22/2005 | US20050207583 Audio enhancement system and method |
| 09/21/2005 | CN1672462A Signal strength information dependent control of small electrodynamic transducers in audio systems |
| 09/21/2005 | CN1672325A Acoustical virtual reality engine and advanced techniques for enhancing delivered sound |
| 09/15/2005 | DE102004006957A1 Verfahren und Vorrichtung zum Verstärken eines Empfangssignals Method and apparatus for amplifying a reception signal |
| 09/08/2005 | US20050195994 Apparatus and method for improving voice clarity |
| 09/08/2005 | US20050195993 Method and apparatus of compensating for speaker distortion in an audio apparatus |
| 09/07/2005 | EP1571753A1 Method and apparatus of compensating for speaker distortion in an audio apparatus |
| 09/01/2005 | US20050191981 Method and device for amplifying a reception signal |
| 08/24/2005 | CN1659507A Apparatus and method for adapting audio signal |
| 08/23/2005 | US6934593 Process for noise reduction, particularly for audio systems, device and computer program product therefor |
| 08/18/2005 | US20050180578 Apparatus and method for adapting audio signal |
| 08/11/2005 | WO2004111994A3 Method, apparatus and computer program for calculating and adjusting the perceived loudness of an audio signal |
| 08/09/2005 | US6928170 Wireless microphone having a split-band audio frequency companding system that provides improved noise reduction and sound quality |
| 07/27/2005 | CN2713734Y Power amplifier with OTG network data processing equipment |
| 07/20/2005 | CN1211919C Loudspeaker driving circuit |
| 06/23/2005 | US20050135635 NVH dependent parallel compression processing for automotive audio systems |
| 06/21/2005 | US6909323 Variable gain amplifier |
| 06/15/2005 | EP1542359A1 Signal compression/expansion device and mobile communication terminal |
| 06/15/2005 | CN1627635A Signal compression/expansion device and mobile communication terminal |
| 06/14/2005 | CA2238021C Dsp decoder for decoding analog sr encoded audio signals |
| 06/09/2005 | US20050123153 Signal compression/expansion device and mobile communication terminal |
| 06/02/2005 | US20050117757 Sound signal processing device and sound signal processing method |
| 05/26/2005 | US20050111683 Hearing compensation system incorporating signal processing techniques |
| 05/25/2005 | EP1532734A2 Acoustical virtual reality engine and advanced techniques for enhancing delivered sound |
| 05/25/2005 | CN1620751A Voice enhancement system |
| 05/24/2005 | CA2169869C Vehicle speaker control system |
| 05/11/2005 | CN1614883A Automatic volume amplitude limiter with automatic gain controlling function |
| 05/05/2005 | US20050094828 Bass boost circuit |
| 05/04/2005 | CN1612469A Bass boost circuit |
| 04/27/2005 | EP1526639A2 Voice enhancement system |
| 04/26/2005 | US6885752 Hearing aid device incorporating signal processing techniques |
| 04/21/2005 | WO2005036740A1 Dynamic bass boost apparatus and method |
| 04/21/2005 | CA2538809A1 Dynamic bass boost apparatus and method |
| 04/20/2005 | CN1198388C Automatic gain and phase controller and method for controlling amplitude and phase of signal |
| 04/14/2005 | WO2005034343A1 Audio pre-amp and mid-band compressor circuit |
| 04/06/2005 | EP1210765A4 Filter banked gain control of audio in a noisy environment |
| 03/31/2005 | US20050069155 Audio pre-amp and mid-band compressor circuit |
| 03/24/2005 | DE10340199A1 Acoustic component for amplifying higher frequency sounds for the elderly and acoustically challenged has frequency selective converter and loudspeaker |
| 03/23/2005 | EP1517324A2 Methods and apparatus for recording reproducing, transmitting and/or receiving compressed data and recording medium therefor |
| 03/17/2005 | US20050059374 AM receiver circuit performing sound quality compensation of AM detection output signal |
| 03/17/2005 | US20050058303 Dynamic bass boost apparatus and method |
| 03/09/2005 | CN1592123A AM receiver circuit |
| 02/22/2005 | US6859540 Noise reduction system for an audio system |
| 02/17/2005 | US20050036633 Apparatus and method for reconstructing high frequency part of signal |
| 02/10/2005 | WO2004098053A3 Volume and compression control in movie theaters |
| 01/26/2005 | EP1501190A1 Method and device for equalization of an audio signal distorted by ambient noise |
| 01/26/2005 | EP1499949A1 Apparatus and method for adapting audio signal |
| 01/20/2005 | US20050013443 Audio correcting apparatus |
| 01/13/2005 | WO2005004114A1 System and method for audio signal processing |
| 01/12/2005 | EP1312162B1 Voice enhancement system |
| 01/04/2005 | CA2286268C Method and apparatus for noise reduction, particularly in hearing aids |
| 12/23/2004 | WO2004111994A2 Method, apparatus and computer program for calculating and adjusting the perceived loudness of an audio signal |
| 12/09/2004 | US20040247110 Methods and apparatus for improving voice quality in an environment with noise |
| 11/25/2004 | WO2003104924A3 Acoustical virtual reality engine and advanced techniques for enhancing delivered sound |
| 11/17/2004 | CN1547803A Audio processing device |
| 11/11/2004 | WO2004098053A2 Volume and compression control in movie theaters |
| 11/11/2004 | CA2520118A1 Volume and compression control in movie theaters |
| 10/28/2004 | US20040213420 Volume and compression control in movie theaters |
| 10/19/2004 | US6807278 Audio noise reduction system implemented through digital signal processing |
| 09/30/2004 | US20040190740 Method for automatic amplification adjustment in a hearing aid device, as well as a hearing aid device |
| 09/23/2004 | US20040184624 Audio mixing circuit |
| 09/09/2004 | DE10308483A1 Verfahren zur automatischen Verstärkungseinstellung in einem Hörhilfegerät sowie Hörhilfegerät A method for automatic gain adjustment in a hearing aid and hearing aid |
| 09/01/2004 | EP1453194A2 Method for automatic adjustment of an amplifier of a hearing aid and hearing aid |
| 08/24/2004 | US6782107 Method and arrangement for automatically controlling the volume in an audio signal reproduction device |
| 08/17/2004 | US6778966 Segmented mapping converter system and method |
| 07/28/2004 | EP1440509A2 Digital audio processor |
| 07/22/2004 | US20040143433 Speech communication apparatus |
| 07/13/2004 | US6763113 Speaker driving circuit |
| 05/26/2004 | EP1421682A2 Audio processing device |
| 05/06/2004 | WO2002080358A3 Digital audio processor |
| 04/29/2004 | US20040080366 Variable gain amplifier |
| 04/21/2004 | CN1491480A Digital audio processor |
| 04/15/2004 | US20040071299 Method and apparatus for adjusting frequency characteristic of signal |
| 04/14/2004 | CN1489283A High fidelity audio signal amplifying method |
| 04/08/2004 | US20040068402 Digital audio processor |
| 04/06/2004 | US6718295 Speech band division decoder |
| 04/01/2004 | DE20311802U1 Speech filter-amplifier combination for interference fading out and hearing improvement, using three potentiometers, four switches, five inductances and number of capacitors |
| 03/25/2004 | US20040057586 Voice enhancement system |
| 03/10/2004 | EP1397024A1 Control circuit for small electrodynamic transducers in audio systems depending on the input signal characteristics |
| 02/26/2004 | WO2004017589A1 Circuit and method for dynamically modifiable signal processor |
| 02/25/2004 | CN1477904A Low voice-frequency compressor |
| 02/19/2004 | WO2004016040A1 Signal strength information dependent control of small electrodynamic transducers in audio systems |
| 02/10/2004 | US6690232 Variable gain amplifier |
| 02/05/2004 | WO2003019775A3 Audio processing device |
| 02/05/2004 | US20040022404 Sound processing apparatus and hearing aid |
| 02/05/2004 | US20040022400 Bass compressor |
| 02/05/2004 | DE10011193B4 Kompandersystem mit einer Kompressorschaltung und einer Expanderschaltung Compander circuit with a compressor and an expander circuit |
| 02/04/2004 | EP1387600A1 Sound processing apparatus and hearing aid |
| 02/04/2004 | EP1387487A2 Method and apparatus for adjusting frequency characteristic of signal |
| 01/27/2004 | CA2238069C Audio noise reduction system implemented through digital signal processing |
| 01/07/2004 | CN1134154C Receiver with internal low-noise high-frequency amplifier |
| 01/06/2004 | US6675125 Statistics generator system and method |
| 12/24/2003 | CN1132317C Methods for recording, reproducing transmitting and/or receiving compressed data |
| 12/23/2003 | US6667966 Ambient field level monitor device for radio mobile terminal |
| 12/18/2003 | WO2003104924A2 Acoustical virtual reality engine and advanced techniques for enhancing delivered sound |
| 12/18/2003 | CA2488689A1 Acoustical virtual reality engine and advanced techniques for enhancing delivered sound |
| 11/06/2003 | WO2003091870A1 Apparatus and method for adapting audio signal |
| 07/23/2003 | EP0976303B1 Method and apparatus for noise reduction, particularly in hearing aids |
| 07/09/2003 | EP1326479A2 Method and apparatus for noise reduction, particularly in hearing aids |