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Class Information
Number: 381/98
Name: Electrical audio signal processing systems and devices > Including frequency control
Description: Subject matter with means to vary or maintain the frequency response of the system.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7613311 |
Digital implementation of a fourth order Linkwitz-Riley network with a low cutoff frequency |
Nov. 3, 2009 |
| 7609841 |
Frequency shifter for use in adaptive feedback cancellers for hearing aids |
Oct. 27, 2009 |
| 7587223 |
Terminal for mobile phone and method for controlling the synchronism of terminal for mobile phone |
Sep. 8, 2009 |
| 7583809 |
Sound signal processing device and sound signal processing method |
Sep. 1, 2009 |
| 7580530 |
Audio characteristic correction system |
Aug. 25, 2009 |
| 7577259 |
Method and apparatus for extending band of audio signal using higher harmonic wave generator |
Aug. 18, 2009 |
| 7577263 |
System for audio signal processing |
Aug. 18, 2009 |
| 7574005 |
Howling frequency component emphasis method and apparatus |
Aug. 11, 2009 |
| 7574009 |
Method and apparatus for controlling the reproduction in audio signals in electroacoustic converters |
Aug. 11, 2009 |
| 7570748 |
Control and monitoring telecommunication system and method of setting a modulation method |
Aug. 4, 2009 |
| 7567678 |
Microphone array method and system, and speech recognition method and system using the same |
Jul. 28, 2009 |
| 7555130 |
Acoustic correction apparatus |
Jun. 30, 2009 |
| 7551742 |
Acoustic signal-processing apparatus and method |
Jun. 23, 2009 |
| 7542815 |
Extraction of left/center/right information from two-channel stereo sources |
Jun. 2, 2009 |
| 7519187 |
Array speaker system |
Apr. 14, 2009 |
| 7519189 |
Processing of an audio signal for presentation in a high noise environment |
Apr. 14, 2009 |
| 7519188 |
Electroacoustical transducing |
Apr. 14, 2009 |
| 7474752 |
Audio frequency range adaptation |
Jan. 6, 2009 |
| 7466829 |
Dynamic bass equalization with modified sallen-key high pass filter |
Dec. 16, 2008 |
| 7466830 |
Equalizing circuit amplifying bass range signal |
Dec. 16, 2008 |
| 7463746 |
Narrow opening electroacoustical transducing |
Dec. 9, 2008 |
| 7460656 |
Distributed processing in conference call systems |
Dec. 2, 2008 |
| 7460678 |
Digital audio processor |
Dec. 2, 2008 |
| 7457422 |
Method and implementation for detecting and characterizing audible transients in noise |
Nov. 25, 2008 |
| 7457421 |
Circuit and program for processing multichannel audio signals and apparatus for reproducing same |
Nov. 25, 2008 |
| 7440576 |
Apparatus and method for reconstructing high frequency part of signal |
Oct. 21, 2008 |
| 7430296 |
Circuit arrangement for reducing the dynamic range of audio signals |
Sep. 30, 2008 |
| 7428308 |
Transmitting and reproducing stereophonic audio signals |
Sep. 23, 2008 |
| 7415118 |
System and method for distributed gain control |
Aug. 19, 2008 |
| 7412220 |
Signal processing |
Aug. 12, 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 |
| 7400735 |
Wave-filtering device with an adjustable frequency bandwidth |
Jul. 15, 2008 |
| 7392880 |
Dual range horn with acoustic crossover |
Jul. 1, 2008 |
| 7394908 |
Apparatus and method for generating harmonics in an audio signal |
Jul. 1, 2008 |
| 7391869 |
Base management systems |
Jun. 24, 2008 |
| 7390960 |
Electronic signal processor |
Jun. 24, 2008 |
| 7388959 |
Harmonic generator and pre-amp |
Jun. 17, 2008 |
| 7372966 |
System for limiting loudspeaker displacement |
May. 13, 2008 |
| 7373209 |
Sound features extracting apparatus, sound data registering apparatus, sound data retrieving apparatus, and methods and programs for implementing the same |
May. 13, 2008 |
| 7369666 |
Audio reproducing system |
May. 6, 2008 |
| 7363096 |
Digital audio signal filtering mechanism and method |
Apr. 22, 2008 |
| 7359519 |
Method and apparatus for compensating for nonlinear distortion of speaker system |
Apr. 15, 2008 |
| 7359521 |
Aliasing cancellation in audio effects algorithms |
Apr. 15, 2008 |
| 7356150 |
Method and apparatus for extending band of audio signal using noise signal generator |
Apr. 8, 2008 |
| 7352872 |
Filter circuit and method for processing an audio signal |
Apr. 1, 2008 |
| 7346177 |
Method and apparatus for generating audio components |
Mar. 18, 2008 |
| 7346173 |
Method and circuit assemblage for influencing the treble reproduction of an audio signal |
Mar. 18, 2008 |
| 7346326 |
Mobile communication terminal with equalizer function |
Mar. 18, 2008 |
| 7321661 |
Current feedback system for improving crossover frequency response |
Jan. 22, 2008 |
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