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Class Information
Number: 381/71.7
Name: Electrical audio signal processing systems and devices > Acoustical noise or sound cancellation > Particular transducer or enclosure structure
Description: Subject matter specifying details of an electro-acoustic energy converter or housing for use in an active noise cancellation system.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8712086 Acoustic reconfiguration devices and methods Apr. 29, 2014
8705760 Active noise control device Apr. 22, 2014
8666085 Component for noise reducing earphone Mar. 4, 2014
8630424 Active noise control system and method Jan. 14, 2014
8577045 Apparatus and method for encoding a multi-channel audio signal Nov. 5, 2013
8571228 Feedforward ANR device acoustics Oct. 29, 2013
8565463 Loudspeaker system Oct. 22, 2013
8553898 Method and system for reducing acoustical reverberations in an at least partially enclosed space Oct. 8, 2013
8553900 Noise reduction circuit with monitoring functionality Oct. 8, 2013
8542843 Headset with integrated stereo array microphone Sep. 24, 2013
8483399 Condenser microphone, microphone unit, and blood pressure gauge Jul. 9, 2013
8472636 Ambient noise reduction arrangements Jun. 25, 2013
8457324 Directional speaker system Jun. 4, 2013
8411873 Noise control device Apr. 2, 2013
8364298 Filtering application sounds Jan. 29, 2013
8355921 Method, apparatus and computer program product for providing improved audio processing Jan. 15, 2013
8340310 Diaphonic acoustic transduction coupler and ear bud Dec. 25, 2012
8340963 Echo suppressing system, echo suppressing method, recording medium, echo suppressor, sound output device, audio system, navigation system and mobile object Dec. 25, 2012
8280460 Mobile terminal and noise prevention structure of mobile terminal Oct. 2, 2012
8243944 Foldable wireless voice muffling device for mobile communications Aug. 14, 2012
8229126 Noise error amplitude reduction Jul. 24, 2012
8229139 MEMS microphone, production method and method for installing Jul. 24, 2012
8223984 System for forming a hearing protector, ear cup in such a system, and hearing protector formed by such a system Jul. 17, 2012
8224011 Ear cup with microphone device Jul. 17, 2012
8213176 Systems and methods for providing airflow Jul. 3, 2012
8208651 Active sound blocker Jun. 26, 2012
8189801 Ear cup May. 29, 2012
8144889 Noise control system using smart materials Mar. 27, 2012
8144906 Wind immune microphone Mar. 27, 2012
8130995 Earpiece device with microphone Mar. 6, 2012
8121844 Dimension measurement system Feb. 21, 2012
8116472 Noise control device Feb. 14, 2012
8111836 System and method using a phased array of acoustic generators for producing an adaptive null zone Feb. 7, 2012
8103013 Acoustic transducer device Jan. 24, 2012
8103033 Audio system for portable device Jan. 24, 2012
8085942 Audio apparatus and method for use in proximity to a magnetic resonance imaging system Dec. 27, 2011
8085948 Noise reduction in a system Dec. 27, 2011
8085962 Audio system for portable device Dec. 27, 2011
8059827 Noise reduction apparatus Nov. 15, 2011
8040021 Device for the active damping of the vibrations experienced by a fragile part of moving equipment, with autonomous power supply Oct. 18, 2011
8005235 Multi-chamber noise control system Aug. 23, 2011
7986794 Small array microphone apparatus and beam forming method thereof Jul. 26, 2011
7970148 Simultaneous enhancement of transmission loss and absorption coefficient using activated cavities Jun. 28, 2011
7929295 Systems and methods for providing airflow Apr. 19, 2011
7891463 Active muffler Feb. 22, 2011
7894613 Active noise control rack enclosures Feb. 22, 2011
7885415 Device and method for reducing sound of a noise source in narrow frequency ranges Feb. 8, 2011
7885418 Acoustic actuator and passive attenuator incorporating a lightweight acoustic diaphragm with an ultra low resonant frequency coupled with a shallow enclosure of small volume Feb. 8, 2011
7881480 System for detecting and reducing noise via a microphone array Feb. 1, 2011
7856112 Desktop terminal foot and desktop system Dec. 21, 2010

1 2 3 4










 
 
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