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Class Information
Number: 381/101
Name: Electrical audio signal processing systems and devices > Including frequency control > Automatic tone control
Description: Subject matter having a control used to alter automatically the frequency response of the system so that a listener can be provided the most pleasing sound.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7624259 |
Method and system for unified audio control on a personal computer |
Nov. 24, 2009 |
| 7542815 |
Extraction of left/center/right information from two-channel stereo sources |
Jun. 2, 2009 |
| 7394908 |
Apparatus and method for generating harmonics in an audio signal |
Jul. 1, 2008 |
| 7390960 |
Electronic signal processor |
Jun. 24, 2008 |
| 7352872 |
Filter circuit and method for processing an audio signal |
Apr. 1, 2008 |
| 7302067 |
Audio system for a computer |
Nov. 27, 2007 |
| 7266205 |
Linearized filter band equipment and processes |
Sep. 4, 2007 |
| 7216221 |
Method and system for unified audio control on a personal computer |
May. 8, 2007 |
| 7079660 |
Bass compensation device and a sound system using the device |
Jul. 18, 2006 |
| 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 |
| 7043032 |
Tone-control circuit and method for conditioning respective frequency bands of an audio signal |
May. 9, 2006 |
| 7024260 |
Method and apparatus for processing digital audio signal |
Apr. 4, 2006 |
| 7016509 |
System and method for varying low audio frequencies inversely with audio signal level |
Mar. 21, 2006 |
| 6931139 |
Computer audio system |
Aug. 16, 2005 |
| 6928172 |
Automatic sound field correcting system |
Aug. 9, 2005 |
| 6895290 |
Limiting the damaging effects of loud music from audio systems, particularly from automobile audio systems |
May. 17, 2005 |
| 6892103 |
Digital tone control with linear step coefficients |
May. 10, 2005 |
| 6859538 |
Plug and play compatible speakers |
Feb. 22, 2005 |
| 6845165 |
Acoustic effect apparatus and method and program recorded medium therefor |
Jan. 18, 2005 |
| 6775629 |
System and method for estimating one or more tones in an input signal |
Aug. 10, 2004 |
| 6751323 |
Electroacoustic apparatus having ringing signal generation means capable of producing a subjective bass perception |
Jun. 15, 2004 |
| 6675141 |
Apparatus for converting reproducing speed and method of converting reproducing speed |
Jan. 6, 2004 |
| 6665408 |
Dynamic bass control circuit with variable cut-off frequency |
Dec. 16, 2003 |
| 6587566 |
Sound field forming circuit and sound field forming apparatus |
Jul. 1, 2003 |
| 6341166 |
Automatic correction of power spectral balance in audio source material |
Jan. 22, 2002 |
| 6300553 |
Pitch shifter |
Oct. 9, 2001 |
| 6163614 |
Pitch shift apparatus and method |
Dec. 19, 2000 |
| 6151400 |
Automatic sensitivity control |
Nov. 21, 2000 |
| 6148189 |
AGC circuit arrangement for a tuner |
Nov. 14, 2000 |
| 6108428 |
Tone control device and sound volume/tone control device for reducing noise at the time of tone modification |
Aug. 22, 2000 |
| 6101257 |
Audio signal processor |
Aug. 8, 2000 |
| 6088460 |
Equalizer and audio device using the same |
Jul. 11, 2000 |
| 6078670 |
Method and arrangement for reproducing audio signals |
Jun. 20, 2000 |
| 6011852 |
Audio power amplifier device for micro-computers |
Jan. 4, 2000 |
| 5754668 |
Equalizer and audio device using the same |
May. 19, 1998 |
| 5751816 |
Audio power amplifier device for micro-computers |
May. 12, 1998 |
| 5748754 |
Sound system gain and equalization circuit |
May. 5, 1998 |
| 5740260 |
Midi to analog sound processor interface |
Apr. 14, 1998 |
| 5708723 |
Recording and reproducing apparatus for audio signal |
Jan. 13, 1998 |
| 5686863 |
Tunable tone control circuit and a device and method for tuning the RC constants |
Nov. 11, 1997 |
| 5631714 |
Apparatus for automatically adapting the mean sound level of a television receiver |
May. 20, 1997 |
| 5579404 |
Digital audio limiter |
Nov. 26, 1996 |
| 5574792 |
Volume and tone control circuit for acoustic reproduction sets |
Nov. 12, 1996 |
| 5572443 |
Acoustic characteristic correction device |
Nov. 5, 1996 |
| 5530924 |
Radio station memory presets with stored audio effects |
Jun. 25, 1996 |
| 5473686 |
Echo cancellation apparatus |
Dec. 5, 1995 |
| 5398005 |
Voss tone control circuit with reduced distortion and reduced DC offset |
Mar. 14, 1995 |
| 5371803 |
Tone reduction circuit for headsets |
Dec. 6, 1994 |
| 5323277 |
Sound recording apparatus |
Jun. 21, 1994 |
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