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Electrical audio signal processing systems and devices

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
381150000 ELECTRO-ACOUSTIC AUDIO TRANSDUCER 2302
381312000 HEARING AIDS, ELECTRICAL 1060
381001000 BINAURAL AND STEREOPHONIC 1057
381710100 ACOUSTICAL NOISE OR SOUND CANCELLATION 436
381058000 MONITORING/MEASURING OF AUDIO DEVICES 359
381104000 INCLUDING AMPLITUDE OR VOLUME CONTROL 338
381940100 NOISE OR DISTORTION SUPPRESSION 299
381056000 MONITORING OF SOUND 286
381092000 DIRECTIVE CIRCUITS FOR MICROPHONES 247
381087000 HAVING NON-ELECTRICAL FEATURE (E.G., MOUNTING) 230
381074000 HEADPHONE CIRCUITS 228
381098000 INCLUDING FREQUENCY CONTROL 211
381077000 ONE-WAY AUDIO SIGNAL PROGRAM DISTRIBUTION 199
381120000 WITH AMPLIFIER 182
381086000 VEHICLE 142
381066000 DEREVERBERATORS 135
381119000 WITH MIXER 128
381111000 CIRCUITRY COMBINED WITH SPECIFIC TYPE MICROPHONE OR LOUDSPEAKER 99
381061000 SOUND EFFECTS 92
381730100 SOUND OR NOISE MASKING 55
381122000 HAVING MICROPHONE 53
381123000 SWITCHING 44
381097000 INCLUDING PHASE CONTROL 33
381055000 AUDIO TRANSDUCER PROTECTION CIRCUITRY 30
381072000 HEARING PROTECTORS, ELECTRICAL 26
381093000 FEEDBACK SUPPRESSION 24
381067000 STETHOSCOPES, ELECTRICAL 20
381118000 WITH MUSICAL INSTRUMENT 10
381110000 VOICE CONTROLLED 8
381096000 LOUDSPEAKER FEEDBACK 7
381095000 MICROPHONE FEEDBACK 3
20090046870AUTO BIAS MICROPHONE SYSTEM FOR USE WITH MULTIPLE LOADS AND METHOD OF FORMING SAME - An autobias vehicular microphone system (02-19-2009
20090110213PROGRAMMABLE INTEGRATED MICROPHONE INTERFACE CIRCUIT - An integrated circuit for providing programmable microphone interface includes an input terminal for receiving an input signal and an output terminal for providing an output audio signal. The integrated circuit includes a bias circuit, an amplifier circuit, and two feedback circuits. The bias circuit provides a microphone bias signal to the microphone and provides a sensed microphone signal. The amplifier circuit includes a first input, a second input, and an output. The first input is configured to receive the sensed microphone signal, a first feedback signal, and a second feedback signal. The second input is configured to receive a first reference signal. The feedback circuits are in communication with the output and the first input of the amplifier circuit. In a specific embodiment, the first feedback circuit includes an RC circuit and the second feedback circuit includes an integrator.04-30-2009
20130136276METHOD AND APPARATUS FOR RECEIVING AND PLAYING A SIGNAL IN A RADIO RECEIVER - A method and apparatus for receiving and playing a signal in a radio receiver to suppress microphonic feedback are provided by alternately pitch shifting a received audio signal. The pitch of the received audio signal is alternately shifted up and then down, repeatedly over successive intervals of the audio signal, to produce a pitch swing signal which is then played over a speaker. The alternating pitch shifting prevents the buildup of regenerative feedback normally caused by acoustic vibrations coupling into the radio receiver.05-30-2013
381124000 MISCELLANEOUS 2
20090279718AUDIO RECORDATION AND REPRODUCTION SPRING CLIPS - A method of releasably securing an article with an audio recording includes handling a binder clip having audio circuitry with recordation and playback capabilities. The binder clip includes a pair of actuating arms and a gripping portion. The audio circuitry is in the form other than that of a cell phone attached to the binder clip. The method additionally includes compressing the pair of actuating arms of the binder clip above the gripping portion to expand the gripping portion and inserting at least a portion of the article into the gripping portion. The method further includes releasing the actuating arms so that the gripping portion grips the portion of the article inside the binder clip and recording audio onto the audio circuitry.11-12-2009
20100278360METHOD AND SUPPORT SYSTEM FOR PRESENTING ELECTROPHYSIOLOGICAL MEASUREMENTS11-04-2010
381076000 LECTERNS 1
20130202128System and Method for Determining Meter Presence Utilizing Ambient Fingerprints - Systems and methods are disclosed for providing portable device presence utilizing environmental ambient audio fingerprints. Portable devices provide media exposure data and environmental ambient fingerprints to a processing device, where the environmental ambient signatures provide at least one characteristic of the ambient audio surrounding each portable device. The environmental ambient signatures are then processed to determine if they match. Portable devices associated with matching signatures are identified. Ambient fingerprints may also be used to establish a logical location where media exposure took place. The ambient signatures are alternately combined with monitored data to provide more robust data sets for contextual processing.08-08-2013
381070000 ARTIFICIAL LARYNX, ELECTRICAL 1
20110051944Laryngophone combined with transmitter and power source - A method of transmitting the human voice comprising an apparatus worn around the user's neck that contains a laryngophone (“throat microphone”), a transmitter and a power source.03-03-2011

Patent applications in class Electrical audio signal processing systems and devices

Patent applications in all subclasses Electrical audio signal processing systems and devices