| 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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| 01/21/1999 | WO1999003199A1 Voice signal processor |
| 01/20/1999 | EP0891652A1 Method for automatically adjusting audio response for improved intelligibility |
| 11/03/1998 | US5832438 Apparatus and method for audio computing |
| 10/27/1998 | US5828762 Apparatus for compensating audio signal recording |
| 10/22/1998 | WO1998047315A1 Method and apparatus for noise reduction, particularly in hearing aids |
| 10/15/1998 | WO1998045940A1 Automatic volume control in an audio-signal reproduction facility, and device required |
| 10/14/1998 | EP0870391A2 Voice enhancement system and method |
| 10/08/1998 | DE19713862A1 Verfahren zur automatischen Lautstärkesteuerung in einer Audiosignal-Wiedergabevorrichtung und Anordnung dazu Method for automatic volume control in an audio signal reproducing apparatus and arrangement to |
| 10/06/1998 | US5819214 Length of a processing block is rendered variable responsive to input signals |
| 09/22/1998 | CA2100154C Switched signal processing circuit |
| 09/09/1998 | EP0862778A1 Audio noise reduction system implemented through digital signal processing |
| 09/09/1998 | EP0862777A1 Dsp decoder for decoding analog sr encoded audio signals |
| 09/08/1998 | US5805716 For processing a received audio signal |
| 09/02/1998 | EP0591441B1 An improved multiband programmable compression system |
| 08/04/1998 | US5790671 Method for automatically adjusting audio response for improved intelligibility |
| 08/04/1998 | US5789977 Arrangement for influencing an audio signal |
| 05/20/1998 | CN1182270A Apparatus for compensating frequency characteristic of reproduction audio signal |
| 05/20/1998 | CN1182269A Apparatus for compensating audio signal recording |
| 05/13/1998 | EP0841757A1 Compander-type dynamic noise suppression device |
| 05/05/1998 | US5748754 Sound system gain and equalization circuit |
| 04/29/1998 | CN2280385Y Amplifier |
| 04/28/1998 | US5745846 Channelized apparatus for equalizing carrier powers of multicarrier signal |
| 04/08/1998 | EP0717888A4 Variable gain amplifier |
| 04/07/1998 | US5737432 Split-band clipper |
| 04/07/1998 | US5736897 Low input signal bandwidth compressor and amplifier control circuit with a state variable pre-amplifier |
| 03/03/1998 | US5724434 Magnetoresistive audio limiter |
| 03/03/1998 | US5724006 Circuit arrangement with controllable transmission characteristics |
| 02/10/1998 | US5717773 Sound system gain and equalization circuit |
| 12/10/1997 | EP0811271A1 Audio amplifier |
| 11/20/1997 | DE19619272A1 Automatic modulation method for electrical signal before transmission or storage |
| 11/11/1997 | US5687241 Circuit arrangement for automatic gain control of hearing aids |
| 10/29/1997 | EP0803978A2 Tone control device and sound volume/tone control device for reducing noise at the time of tone modification |
| 10/21/1997 | US5680468 Methods of and systems for speaker equalization in automotive vehicles having convertible tops |
| 10/16/1997 | WO1997038488A1 Method for automatically adjusting audio response for improved intelligibility |
| 09/12/1997 | WO1997024858A3 Voice enhancement system and method |
| 09/09/1997 | US5666429 Energy estimator and method therefor |
| 08/13/1997 | EP0500700B1 High fidelity hearing aid amplifier |
| 07/10/1997 | WO1997024858A2 Voice enhancement system and method |
| 07/10/1997 | CA2241903A1 Voice enhancement system and method |
| 07/03/1997 | WO1997023948A1 Audio amplifier |
| 05/29/1997 | WO1997019448A1 Audio noise reduction system implemented through digital signal processing |
| 05/29/1997 | WO1997019447A1 Dsp decoder for decoding analog sr encoded audio signals |
| 05/27/1997 | US5633940 Audio amplifier arrangement |
| 05/21/1997 | EP0732036B1 Automatic regulation circuitry for hearing aids |
| 03/12/1997 | EP0762661A2 Channelized multi-carrier signal processor |
| 02/06/1997 | WO1997004535A1 Compander-type dynamic noise suppression device |
| 11/13/1996 | CN1135682A Control circuit of low input-signal bandwidth compressor and amplifier |
| 10/22/1996 | US5568086 Linear power amplifier for high efficiency multi-carrier performance |
| 10/03/1996 | WO1996031000A1 Sound system gain and equalization circuit |
| 09/18/1996 | EP0732036A1 Automatic regulation circuitry for hearing aids |
| 09/03/1996 | US5553151 Hearing aid for a hearing-impaired person |
| 08/28/1996 | EP0729227A1 Vehicle speaker control system |
| 08/27/1996 | US5550925 Sound processing device |
| 08/20/1996 | US5548574 Apparatus for high-speed recording compressed digital audio data with two dimensional blocks and its compressing parameters |
| 07/31/1996 | EP0724329A1 Low input signal bandwidth compressor and amplifier control circuit |
| 07/09/1996 | US5535246 Method of video noise reduction using non-linear pre/de-emphasis |
| 06/26/1996 | EP0717888A1 Variable gain amplifier |
| 06/25/1996 | US5530769 Equalizer and audio device using the same |
| 05/07/1996 | US5515446 Electronic audio accurate reproduction system and method |
| 04/24/1996 | EP0354955B1 Improved multi-band programmable compression system |
| 04/23/1996 | US5510752 Low input signal bandwidth compressor and amplifier control circuit |
| 04/09/1996 | US5506910 Automatic equalizer |
| 03/06/1996 | EP0700153A2 Circuit with a controllable transfer characteristic |
| 02/13/1996 | US5491755 Circuit for digital processing of audio signals |
| 02/08/1996 | DE4427912A1 Adapting audio playback appts. output signals to noise level inside vehicle |
| 01/30/1996 | US5488668 For use in a hearing aid |
| 01/18/1996 | DE4441755C1 Electronic hearing aid circuit with noise suppression |
| 01/16/1996 | US5485524 System for processing an audio signal so as to reduce the noise contained therein by monitoring the audio signal content within a plurality of frequency bands |
| 01/02/1996 | US5481617 Loudspeaker arrangement with frequency dependent amplitude regulation |
| 11/21/1995 | US5469510 Arbitration adjustment for acoustic reproduction systems |
| 10/17/1995 | US5459791 Audio frequency filter |
| 10/04/1995 | CN1109657A Audio amplifier |
| 09/21/1995 | WO1995025382A1 Noise cancellation system and method |
| 08/01/1995 | US5438689 Radio receiver for a vehicle having improved audibility for speech |
| 07/18/1995 | US5434867 Audio amplifier arrangement having a volume dependent tone control |
| 07/04/1995 | US5430894 Radio receiver noise suppression system |
| 06/27/1995 | US5428832 Noise suppression apparatus |
| 05/08/1995 | WO1995015668A1 Automatic regulation circuitry for hearing aids |
| 04/19/1995 | EP0591441A4 An improved multiband programmable compression system. |
| 04/11/1995 | US5406635 Noise attenuation system |
| 04/04/1995 | US5404115 Variable gain amplifier |
| 03/29/1995 | CN1100850A Methods and apparatus for recording, reproducing, transmitting and/or receiving compressed data and recording medium therefor |
| 03/09/1995 | WO1995006976A1 Variable gain amplifier |
| 03/09/1995 | CA2169724A1 Variable gain amplifier |
| 02/08/1995 | CN1098539A Sound system gain and equalization circuit |
| 01/19/1995 | DE4318531A1 Method and circuit arrangement for amplifying signals in a broad frequency range |
| 12/28/1994 | EP0631383A2 Acoustic reproduction systems |
| 12/27/1994 | US5377272 Switched signal processing circuit |
| 12/13/1994 | US5373562 Signal processor for sterophonic signals |
| 11/02/1994 | EP0622896A1 Sound system gain and equalization circuit |
| 10/29/1994 | CA2121299A1 Sound system gain and equalization circuit |
| 10/26/1994 | EP0621687A2 Audio amplifier arrangement |
| 10/25/1994 | US5359665 Audio bass frequency enhancement |
| 09/21/1994 | EP0616425A1 Audio amplifier arrangement |
| 09/14/1994 | EP0615349A2 Methods and apparatus for recording, reproducing, transmitting and/or receiving compressed data and recording medium therefor |
| 09/14/1994 | EP0615348A1 Devices for recording and/or reproducing or transmitting and/or receiving compressed data and recording medium therefor |
| 08/10/1994 | EP0609665A1 Circuit for digital processing of audio signals |
| 06/28/1994 | US5325440 Loudness control circuit |
| 06/01/1994 | EP0599132A2 System for processing an audio signal |
| 04/13/1994 | EP0591441A1 An improved multiband programmable compression system |