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Class Information
Number: 381/111
Name: Electrical audio signal processing systems and devices > Circuitry combined with specific type microphone or loudspeaker
Description: Subject matter combined with a specific audio-to-electrical signal or electrical-to-audio transducer.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620189 |
Polarization voltage setting of microphones |
Nov. 17, 2009 |
| 7599705 |
Wireless transmitter and hearing system |
Oct. 6, 2009 |
| 7596230 |
Method for detection of ultrasound in a listening device with two or more microphones, and listening device with two or more microphones |
Sep. 29, 2009 |
| 7587056 |
Small array microphone apparatus and noise suppression methods thereof |
Sep. 8, 2009 |
| 7580532 |
Multi-channel pulse width modulation apparatus |
Aug. 25, 2009 |
| 7580762 |
Microphone with ultrasound/audible mixing chamber to secure audio path |
Aug. 25, 2009 |
| 7548626 |
Detection and control of diaphragm collapse in condenser microphones |
Jun. 16, 2009 |
| 7542813 |
Rapidly optimized wireless microphone system and method for controlling thereof |
Jun. 2, 2009 |
| 7542578 |
Condenser microphone |
Jun. 2, 2009 |
| 7522737 |
Microphones with equal sensitivity |
Apr. 21, 2009 |
| 7519175 |
Integral microphone and speaker configuration type two-way communication apparatus |
Apr. 14, 2009 |
| 7505600 |
Processor control of an audio transducer |
Mar. 17, 2009 |
| 7502481 |
Microphone with ultrasound/audible mixing chamber to secure audio path |
Mar. 10, 2009 |
| 7499557 |
Driving method of speaker and the driving circuit thereof |
Mar. 3, 2009 |
| 7474757 |
Circuit and method for providing an auto-off and/or auto-on capability for an audio device |
Jan. 6, 2009 |
| 7471798 |
Microphone array having a second order directional pattern |
Dec. 30, 2008 |
| 7463743 |
Electronic driving circuit for directing an audio signal selectively to one of two speakers |
Dec. 9, 2008 |
| 7443990 |
Voltage biased capacitor circuit for a loudspeaker |
Oct. 28, 2008 |
| 7391877 |
Spatial processor for enhanced performance in multi-talker speech displays |
Jun. 24, 2008 |
| 7391873 |
Microphone with voltage pump |
Jun. 24, 2008 |
| 7391872 |
Parametric audio system |
Jun. 24, 2008 |
| 7386135 |
Cardioid beam with a desired null based acoustic devices, systems and methods |
Jun. 10, 2008 |
| 7382889 |
Condenser microphone |
Jun. 3, 2008 |
| 7376236 |
Piezoelectric film sonic emitter |
May. 20, 2008 |
| 7372967 |
Microphone bias circuit |
May. 13, 2008 |
| 7359523 |
Fluidic acoustic transducer |
Apr. 15, 2008 |
| 7340068 |
Device and method for detecting wind noise |
Mar. 4, 2008 |
| 7336794 |
High efficiency driver for miniature loudspeakers |
Feb. 26, 2008 |
| 7321661 |
Current feedback system for improving crossover frequency response |
Jan. 22, 2008 |
| 7298856 |
Chip microphone and method of making same |
Nov. 20, 2007 |
| 7295809 |
Portable audio playback device with bass enhancement |
Nov. 13, 2007 |
| 7236599 |
Generating separate analog audio programs from a digital link |
Jun. 26, 2007 |
| 7227966 |
Piezo-electric speaker |
Jun. 5, 2007 |
| 7221766 |
Microphone input buffer biasing circuit |
May. 22, 2007 |
| 7218741 |
System and method for adaptive multi-sensor arrays |
May. 15, 2007 |
| 7187775 |
Audio signal recording apparatus |
Mar. 6, 2007 |
| 7184561 |
Electronic apparatus having audio output units |
Feb. 27, 2007 |
| 7171011 |
Acoustic drive circuit |
Jan. 30, 2007 |
| 7167569 |
Output coupling capacitor free audio power amplifier dynamically configured for speakers and headphones with excellent click and pop performance |
Jan. 23, 2007 |
| 7167733 |
Portable telephone with detachable earphone and microphone modules |
Jan. 23, 2007 |
| 7146011 |
Steering of directional sound beams |
Dec. 5, 2006 |
| 7130434 |
Microphone PCB with integrated filter |
Oct. 31, 2006 |
| 7110560 |
Electret condensor microphone preamplifier that is insensitive to leakage currents at the input |
Sep. 19, 2006 |
| 7106865 |
Speaker diagnostics based upon driving-point impedance |
Sep. 12, 2006 |
| 7099481 |
Method and system for automatically detecting and powering PC speakers |
Aug. 29, 2006 |
| 7091893 |
Loudspeaker control circuit |
Aug. 15, 2006 |
| 7092539 |
MEMS based acoustic array |
Aug. 15, 2006 |
| 7089042 |
Headset with variable gain based on position of microphone boom |
Aug. 8, 2006 |
| 7085390 |
Method for controlling multi-mode audio gain balance |
Aug. 1, 2006 |
| 7076070 |
Monolithic class D amplifier |
Jul. 11, 2006 |
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