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Class Information
Number: 381/108
Name: Electrical audio signal processing systems and devices > Including amplitude or volume control > Automatic > Including feedback
Description: Subject matter further having provision for returning a fraction of an output signal back to an input.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7609840 |
System and method for hierarchical audio conflict control |
Oct. 27, 2009 |
| 7606378 |
Radio distortion processing |
Oct. 20, 2009 |
| 7602923 |
Electro acoustic system built-in test and calibration method |
Oct. 13, 2009 |
| 7583807 |
Set volume control device for on-vehicle audio system |
Sep. 1, 2009 |
| 7552050 |
Speech recognition system and method utilizing adaptive cancellation for talk-back voice |
Jun. 23, 2009 |
| 7532728 |
Mechanism for using the allpass decomposition architecture for the cauer low pass filter used in a BTSC |
May. 12, 2009 |
| 7440577 |
Methods and apparatus for automatic mixing of audio signals |
Oct. 21, 2008 |
| 7440530 |
Circuit for and method of optimizing the transmission of data on a communication channel |
Oct. 21, 2008 |
| 7415119 |
Method for hierarchical audio conflict control |
Aug. 19, 2008 |
| 7212640 |
Variable attack and release system and method |
May. 1, 2007 |
| 7068799 |
Sound field correcting method in audio system |
Jun. 27, 2006 |
| 7058187 |
Automatic sound field correcting system and a sound field correcting method |
Jun. 6, 2006 |
| 6934593 |
Process for noise reduction, particularly for audio systems, device and computer program product therefor |
Aug. 23, 2005 |
| 6928172 |
Automatic sound field correcting system |
Aug. 9, 2005 |
| 6907129 |
System and method for digital volume control |
Jun. 14, 2005 |
| 6876751 |
Band-limited adaptive feedback canceller for hearing aids |
Apr. 5, 2005 |
| 6868162 |
Method and apparatus for automatic volume control in an audio system |
Mar. 15, 2005 |
| 6678382 |
Digital attenuator |
Jan. 13, 2004 |
| 6618486 |
Controller for FM 412 multiplex power regulation |
Sep. 9, 2003 |
| 6542612 |
Companding amplifier with sidechannel gain control |
Apr. 1, 2003 |
| 6501717 |
Apparatus and method for processing digital audio signals of plural channels to derive combined signals with overflow prevented |
Dec. 31, 2002 |
| 6396549 |
Remote controller for a multi-device television receiving system providing channel number auto-completion, presettable audio hush level and base channel auto-reaffirm |
May. 28, 2002 |
| 6266423 |
Microphone output limiter |
Jul. 24, 2001 |
| 6195029 |
Analog to digital conversion system that enables high-level signal excursions without clipping |
Feb. 27, 2001 |
| 6154550 |
Method and arrangement for automatically limiting distortion in audio devices |
Nov. 28, 2000 |
| 6081603 |
Method and apparatus for automatic gain control using a linear limiter circuit with voltage controlled resistors as a variable element |
Jun. 27, 2000 |
| 5983183 |
Audio automatic gain control system |
Nov. 9, 1999 |
| 5912977 |
Distortion suppression in hearing aids with AGC |
Jun. 15, 1999 |
| 5910995 |
DSP decoder for decoding analog SR encoded audio signals |
Jun. 8, 1999 |
| 5907622 |
Automatic noise compensation system for audio reproduction equipment |
May. 25, 1999 |
| 5905802 |
Dual action automatic sound level control |
May. 18, 1999 |
| 5896458 |
Sticky leveler |
Apr. 20, 1999 |
| 5870705 |
Method of setting input levels in a voice recognition system |
Feb. 9, 1999 |
| 5862238 |
Hearing aid having input and output gain compression circuits |
Jan. 19, 1999 |
| 5854845 |
Method and circuit for voice automatic gain control |
Dec. 29, 1998 |
| 5844992 |
Fuzzy logic device for automatic sound control |
Dec. 1, 1998 |
| 5822018 |
Method and apparatus for normalizing signal levels in a signal processing system |
Oct. 13, 1998 |
| 5796847 |
Sound reproduction apparatus |
Aug. 18, 1998 |
| 5771297 |
Electronic audio device and method of operation |
Jun. 23, 1998 |
| 5761316 |
Variable and reactive audio power amplifier |
Jun. 2, 1998 |
| 5724433 |
Adaptive gain and filtering circuit for a sound reproduction system |
Mar. 3, 1998 |
| 5724434 |
Magnetoresistive audio limiter |
Mar. 3, 1998 |
| 5661815 |
Volume reservation apparatus of an audio system and a method thereof |
Aug. 26, 1997 |
| 5651073 |
Automatic level control circuit for restricting sound level |
Jul. 22, 1997 |
| 5633940 |
Audio amplifier arrangement |
May. 27, 1997 |
| 5615270 |
Method and apparatus for dynamic sound optimization |
Mar. 25, 1997 |
| 5577126 |
Overload protection circuit for transducers |
Nov. 19, 1996 |
| 5537668 |
Audio signal reproducing device |
Jul. 16, 1996 |
| 5530761 |
Automatic process of adjustment of the volume of sound reproduction |
Jun. 25, 1996 |
| 5530767 |
Reception volume limiting circuit |
Jun. 25, 1996 |
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