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Class Information
Number: 381/102
Name: Electrical audio signal processing systems and devices > Including frequency control > Automatic tone control > With amplitude control
Description: Subject matter including automatic tone control combined with means for adjusting or setting the signal level or for obtaining a substantially constant amplitude output signal for a range of variations of the amplitude of an input signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7606378 |
Radio distortion processing |
Oct. 20, 2009 |
| 7599503 |
Audio output level setting method and device |
Oct. 6, 2009 |
| 7587254 |
Dynamic range control and equalization of digital audio using warped processing |
Sep. 8, 2009 |
| 7583809 |
Sound signal processing device and sound signal processing method |
Sep. 1, 2009 |
| 7577263 |
System for audio signal processing |
Aug. 18, 2009 |
| 7542815 |
Extraction of left/center/right information from two-channel stereo sources |
Jun. 2, 2009 |
| 7519187 |
Array speaker system |
Apr. 14, 2009 |
| 7499556 |
Integrating apparatus |
Mar. 3, 2009 |
| 7492914 |
Audio receiving system |
Feb. 17, 2009 |
| 7489790 |
Digital automatic gain control |
Feb. 10, 2009 |
| 7474755 |
Automatic microphone equalization in a directional microphone system with at least three microphones |
Jan. 6, 2009 |
| 7460678 |
Digital audio processor |
Dec. 2, 2008 |
| 7457424 |
Electronic volume device and remote controller thereof |
Nov. 25, 2008 |
| 7424120 |
Method and apparatus for volume control |
Sep. 9, 2008 |
| 7409067 |
Method and apparatus for adjusting frequency characteristic of signal |
Aug. 5, 2008 |
| 7409066 |
Method of adjusting filter parameters and an associated playback system |
Aug. 5, 2008 |
| 7403626 |
Level adjustment apparatus |
Jul. 22, 2008 |
| 7391875 |
Peak-limiting mixer for multiple audio tracks |
Jun. 24, 2008 |
| 7346173 |
Method and circuit assemblage for influencing the treble reproduction of an audio signal |
Mar. 18, 2008 |
| 7343019 |
Streaming normalization |
Mar. 11, 2008 |
| 7340069 |
System and method for split automatic gain control |
Mar. 4, 2008 |
| 7330554 |
Volume control apparatus and method thereof |
Feb. 12, 2008 |
| 7319764 |
Method and apparatus for controlling volume |
Jan. 15, 2008 |
| 7286675 |
Audio signal processors |
Oct. 23, 2007 |
| 7266205 |
Linearized filter band equipment and processes |
Sep. 4, 2007 |
| 7248702 |
Sound enhancement system |
Jul. 24, 2007 |
| 7171010 |
Dynamic bass boost apparatus and method |
Jan. 30, 2007 |
| 7123724 |
Sound system |
Oct. 17, 2006 |
| 7116790 |
Loudspeaker |
Oct. 3, 2006 |
| 7110555 |
Sound signal reproducing apparatus |
Sep. 19, 2006 |
| 7107109 |
Process for adjusting the sound volume of a digital sound recording |
Sep. 12, 2006 |
| 7095860 |
Audio dynamic control effects synthesizer with or without analyzer |
Aug. 22, 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 |
| 7024008 |
Acoustic quality enhancement via feedback and equalization for mobile multimedia systems |
Apr. 4, 2006 |
| 7024260 |
Method and apparatus for processing digital audio signal |
Apr. 4, 2006 |
| 6970571 |
Low cost hearing protection device |
Nov. 29, 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 |
| 6795740 |
Rectifying overflow and underflow in equalized audio waveforms |
Sep. 21, 2004 |
| 6731768 |
Hearing aid having switched release automatic gain control |
May. 4, 2004 |
| 6665408 |
Dynamic bass control circuit with variable cut-off frequency |
Dec. 16, 2003 |
| 6442281 |
Loudness volume control system |
Aug. 27, 2002 |
| 6298139 |
Apparatus and method for maintaining a constant speech envelope using variable coefficient automatic gain control |
Oct. 2, 2001 |
| 6252968 |
Acoustic quality enhancement via feedback and equalization for mobile multimedia systems |
Jun. 26, 2001 |
| RE37223 |
Dynamic equalizing |
Jun. 12, 2001 |
| 6195438 |
Method and apparatus for leveling and equalizing the audio output of an audio or audio-visual system |
Feb. 27, 2001 |
| 6167139 |
Apparatus and method for controlling sound for audio/video appliance |
Dec. 26, 2000 |
| 6147558 |
Attenuating volume control |
Nov. 14, 2000 |
| 6148189 |
AGC circuit arrangement for a tuner |
Nov. 14, 2000 |
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