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Browse by Category: Main > Electrical & Energy
Class Information
Number: 381/93
Name: Electrical audio signal processing systems and devices > Feedback suppression
Description: Subject matter for prevention or reduction of an output signal from being returned to an input.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8712073 Method and apparatus for blind signal extraction Apr. 29, 2014
8705752 Low frequency noise reduction circuit architecture for communications applications Apr. 22, 2014
8705759 Method for determining a signal component for reducing noise in an input signal Apr. 22, 2014
8681999 Entrainment avoidance with an auto regressive filter Mar. 25, 2014
8675883 Apparatus and associated methodology for suppressing an acoustic echo Mar. 18, 2014
8666527 System for elimination of acoustic feedback Mar. 4, 2014
8660272 Parameter setting method and audio apparatus Feb. 25, 2014
8660281 Method and system for a multi-microphone noise reduction Feb. 25, 2014
8634575 System for elimination of acoustic feedback Jan. 21, 2014
8634576 Output phase modulation entrainment containment for digital filters Jan. 21, 2014
8630426 Howling suppression using echo cancellation Jan. 14, 2014
8588430 Controlling an adaptation of a behavior of an audio device to a current acoustic environmental condition Nov. 19, 2013
8526632 Microphone array for a camera speakerphone Sep. 3, 2013
8494178 Avoiding audio feedback Jul. 23, 2013
8494179 Mixer with adaptive post-filtering Jul. 23, 2013
8488807 Audio signal compensation device and audio signal compensation method Jul. 16, 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
8477952 Audio system with feedback detection means Jul. 2, 2013
8462193 Method and system for processing audio signals Jun. 11, 2013
8462958 Apparatus and method for computing filter coefficients for echo suppression Jun. 11, 2013
8447047 Information processing apparatus and information processing method May. 21, 2013
8428274 Apparatus and method for detecting acoustic feedback Apr. 23, 2013
8422707 Spectral content modification for robust feedback channel estimation Apr. 16, 2013
8422708 Adaptive long-term prediction filter for adaptive whitening Apr. 16, 2013
8411871 Echo cancellation Apr. 2, 2013
8406430 Simulated background noise enabled echo canceller Mar. 26, 2013
8401201 Sound processing apparatus and method Mar. 19, 2013
8385557 Multichannel acoustic echo reduction Feb. 26, 2013
8379870 Ambient audio transformation modes Feb. 19, 2013
8369511 Robust method of echo suppressor Feb. 5, 2013
8364472 Voice encoding device and voice encoding method Jan. 29, 2013
8358797 Switch for a hearing aid Jan. 22, 2013
8340317 Stereo audio-signal processing system Dec. 25, 2012
8331575 Data processing apparatus and parameter generating apparatus applied to surround system Dec. 11, 2012
8325938 Handsfree call apparatus, acoustic reproducing apparatus with handsfree call function, and handsfree call method Dec. 4, 2012
8320574 Methods and systems for reducing acoustic echoes in communication systems Nov. 27, 2012
8320582 Interference signal removing apparatus and RF receiver using the same Nov. 27, 2012
8311590 System and method for improved loudspeaker functionality Nov. 13, 2012
8306234 System for improving communication in a room Nov. 6, 2012
8295519 Codebook based feedback path estimation Oct. 23, 2012
8295771 Bluetooth microphone array Oct. 23, 2012
8280068 Ambient audio transformation using transformation audio Oct. 2, 2012
8280067 Integrated ambient audio transformation device Oct. 2, 2012
8275148 Audio processing apparatus and method Sep. 25, 2012
8265289 Method and system for clear signal capture Sep. 11, 2012
8265290 Dereverberation system and dereverberation method Sep. 11, 2012
8265295 Method and apparatus for identifying feedback in a circuit Sep. 11, 2012
8259974 Configuration and method for detecting feedback in hearing devices Sep. 4, 2012
8254560 Oscillation-echo preventing circuit and microphone/speaker unit Aug. 28, 2012

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