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Class Information
Number: 381/95
Name: Electrical audio signal processing systems and devices > Microphone feedback
Description: Subject matter having a microphone and a circuit and also having provision for returning a fraction of an output signal of the circuit to an input of the circuit.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8675882 Sound signal processing device and method Mar. 18, 2014
8675883 Apparatus and associated methodology for suppressing an acoustic echo Mar. 18, 2014
8675889 Two wire autobias vehicular microphone system having user input functionality and method of forming same Mar. 18, 2014
8660272 Parameter setting method and audio apparatus Feb. 25, 2014
8660281 Method and system for a multi-microphone noise reduction Feb. 25, 2014
8634576 Output phase modulation entrainment containment for digital filters Jan. 21, 2014
8630426 Howling suppression using echo cancellation Jan. 14, 2014
8630685 Method and apparatus for providing sidetone feedback notification to a user of a communication device with multiple microphones Jan. 14, 2014
8615092 Sound processing device, correcting device, correcting method and recording medium Dec. 24, 2013
8600079 Amplifier circuit of capacitor microphone Dec. 3, 2013
8588433 Electret microphone circuit Nov. 19, 2013
8588431 Electrical system for a speaker and its control Nov. 19, 2013
8553906 Apparatus for enabling karaoke Oct. 8, 2013
8509450 Dynamic audibility enhancement Aug. 13, 2013
8503697 Pickup signal processing apparatus, method, and program product Aug. 6, 2013
8483403 System and method for directionally radiating sound Jul. 9, 2013
8477952 Audio system with feedback detection means Jul. 2, 2013
8477976 Method for the detection of whistling in an audio system Jul. 2, 2013
8477956 Howling suppression device, howling suppression method, program, and integrated circuit Jul. 2, 2013
8452034 Entrainment avoidance with a gradient adaptive lattice filter May. 28, 2013
8416959 Hearing enhancement system and components thereof Apr. 9, 2013
8411871 Echo cancellation Apr. 2, 2013
8340317 Stereo audio-signal processing system Dec. 25, 2012
8340314 Audio system for a passenger aircraft and method for controlling same Dec. 25, 2012
8335328 Programmable integrated microphone interface circuit Dec. 18, 2012
8320574 Methods and systems for reducing acoustic echoes in communication systems Nov. 27, 2012
8311237 Howling suppression apparatus and computer readable recording medium Nov. 13, 2012
8295512 Microphone with voltage pump Oct. 23, 2012
8295519 Codebook based feedback path estimation Oct. 23, 2012
8290537 Sidetone adjustment based on headset or earphone type Oct. 16, 2012
8265298 Loudspeaker system Sep. 11, 2012
8265306 Digital microphone and power supply unit for a digital microphone Sep. 11, 2012
8254598 Programmable integrated microphone interface circuit Aug. 28, 2012
8249259 Voice intelligibility enhancement system and voice intelligibility enhancement method Aug. 21, 2012
8249265 Method and apparatus for achieving active noise reduction Aug. 21, 2012
8243956 Auto bias microphone system for use with multiple loads and method of forming same Aug. 14, 2012
8204249 Methods and systems for reducing acoustic echoes in multichannel audio-communication systems Jun. 19, 2012
8189809 Audio device for improved sound reproduction May. 29, 2012
8184823 Headphone device, sound reproduction system, and sound reproduction method May. 22, 2012
8175290 Feedback reduction system May. 8, 2012
8165310 Dereverberation and feedback compensation system Apr. 24, 2012
8160489 Karaoke device with integrated mixing, echo and volume control Apr. 17, 2012
8144892 Audio amplification system Mar. 27, 2012
8135143 Remote conference apparatus and sound emitting/collecting apparatus Mar. 13, 2012
8126183 Audio source tracking arrangement Feb. 28, 2012
8121310 Sound receiving apparatus and method Feb. 21, 2012
8116489 Accoustically transparent occlusion reduction system and method Feb. 14, 2012
8111840 Echo reduction system Feb. 7, 2012
8112283 In-vehicle audio apparatus Feb. 7, 2012
8085947 Multi-channel echo compensation system Dec. 27, 2011

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