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Match Document Document Title
US20140314252 METHOD AND DEVICE FOR REDUCING ACOUSTIC FEEDBACK  
Acoustic feedback in an audio device is reduced or eliminated via a feedback compensator. The feedback compensator disposes of at least one adaptive filter whose adaptation is governed by a...
US20150189437 Squeal Killer  
There are styles of music that rely on the amplification of a harmonica by utilizing a microphone and an amplifier. When a harmonica needs to be amplified to a level where an audience can hear,...
US20090052708 Hearing aid with anti-feedback  
Disclosed is a hearing aid, where at least part of the hearing aid is adapted to be inserted into an ear canal of a user such that one end of the hearing aid and the tympanic membrane in the ear...
US20110170706 Feedback-Killing Speaker System  
A speaker system includes an interface, a powered mixer, a first amplifier, a switch, a feedback killer and a second amplifier. The interface can receives an audio signal from a sound source. The...
US20130279717 SENSOR CIRCUIT AND CALIBRATION METHOD  
A read out circuit for a sensor uses a feedback loop to bias the sensor to a desired operating point, such as the maximal possible sensitivity, but without the problem of an instable sensor...
US20100227643 DUPLEX AUDIO FOR MOBILE COMMUNICATION DEVICE AND ACCESSORY  
Duplex audio is provided for a mobile communication device and an accessory. In some embodiments, the accessory can selectably operate in a duplex audio mode, concurrently sending audio to and...
US20070280487 Howling Detection Method, Device, And Acoustic Device Using The Same  
A howling detector is provided which can discriminate between howling and a signal having a strong narrow-band component, thereby detecting howling with higher accuracy. The howling analyzer...
US20150110318 ELECTRONIC DEVICE  
Provided is an electronic device including: a housing; a vibration body disposed in the housing; and a microphone disposed in the housing. By vibrating the vibration body, the electronic device...
US20120288107 TEST SYSTEM FOR EVALUATING FEEDBACK PERFORMANCE OF A LISTENING DEVICE  
A test system for evaluates acoustic feedback characteristics of a listening device by changing the transfer function of the signal path from an acoustic output to an acoustic input of the...
US20150172815 SYSTEMS AND METHODS FOR FEEDBACK DETECTION  
A method for feedback detection by an electronic device is described. The method includes receiving a first microphone signal by a first microphone. A feedback loop includes the first microphone...
US20070165880 Suppression of Acoustic Feedback in Voice Communications  
Suppressing one or more frequency ranges of a signal prevents the occurrence of feedback in a voice data communications application. A system recognizes a frequency range in a signal where...
US20070269068 Method for suppressing feedback and for spectral extension in hearing devices  
Feedback whistle in hearing devices is intended to be able to be suppressed without loss of output of the useful signal. To this end, it is provided to establish or predetermine a frequency range...
US20100092004 LOUDSPEAKER DEVICE  
The loudspeaker device according to the present invention comprises a loudspeaker; a feedforward processing section for performing feedforward processing on an electric signal to be inputted to...
US20060093157 Audio high-speed reproducing device and audio high-speed reproducing method  
An audio high-speed reproducing device which can reproduce audio data at high speed comprises: setting means for dividing each frame which constitutes the audio data and setting an object portion...
US20110103613 AUDIO SYSTEM WITH FEEDBACK CANCELLATION  
An audio system includes a signal processor for processing an audio signal, and a feedback suppressor circuit configured for modelling a feedback signal path of the audio system by provision of a...
US20150010165 MICROPHONE MODULE WITH AND METHOD FOR FEEDBACK SUPPRESSION  
A microphone module and method for suppressing feedback in a microphone. The module has a casing with a hollow bore therethrough and a microphone mounted in one end of the bore. The other end of...
US20080025527 FEEDBACK REDUCTION SYSTEM  
The present invention relates to a method for processing a microphone signal and a system for audio signal processing with feedback reduction. The method comprises processing the microphone signal...
US20070104335 Acoustic feedback suppression for audio amplification systems  
In a method of acoustic feedback suppression, digitized time-domain samples of acoustic signals are obtained, and discrete time-frequency transformation is performed on the digitized time-domain...
US20110110532 HOWLING SUPPRESSION USING ECHO CANCELLATION  
A method for reducing howling in a communication system containing collocated mobile devices is presented. In a transmitter, an audio signal is received at a microphone. Acoustic feedback is...
US20150104039 APPARATUS AND METHOD OF SUPPRESSING HOWLING  
Disclosed herein is an apparatus of suppressing howling, including: a microphone sensing a voice of a user to generate a voice signal; a memory storing a command for suppressing howling of the...
US20060159282 Method for suppressing electroacoustic feedback  
A method for suppressing electroacoustic feedback in an audio system including a microphone that drives a loudspeaker system via an amplifier, in particular as part of a public address system,...
US20100142726 Noise Cancellation Earphone  
An active noise cancellation earphone (1) has an acoustic path including a cavity (36) and a pipe (20) leading to the auditory canal (40) which are arranged to form an oscillator in use which has...
US20100260351 Speakerphone Feedback Attenuation  
A method is disclosed for acoustic feedback attenuation at a telecommunications terminal. A speakerphone equipped with a loudspeaker and two microphones is featured. Signals from the two...
US20090196445 LISTENING SYSTEM WITH AN IMPROVED FEEDBACK CANCELLATION SYSTEM, A METHOD AND USE  
The invention relates to a listening system comprising a first input transducer for converting an input sound to an electrical input signal, the electrical input signal comprising a direct part...
US20110091049 OUTPUT PHASE MODULATION ENTRAINMENT CONTAINMENT FOR DIGITAL FILTERS  
Method and apparatus for entrainment containment in digital filters using output phase modulation. Phase change is gradually introduced into the acoustic feedback canceller loop to avoid...
US20100290641 ENTRAINMENT RESISTANT FEEDBACK CANCELLATION  
This invention concerns a method, and a device, for feedback cancellation. This invention also concerns a computer program product comprising computer program code means to make a computer execute...
US20120140949 CONFERENCE SYSTEM FOR INDEPENDENTLY ADJUSTING AUDIO PARAMETERS  
A conference system for independently adjusting audio parameters is provided, including a microphone module, a storage module, a digital signal processing module and an amplifier. When any...
US20100246848 MOTIONAL FEEDBACK SYSTEM  
An audio amplifier is operated in an audio system with optimized source impedance to minimize distortion in a loudspeaker that is paired with the audio amplifier. The audio amplifier provides an...
US20130156223 SYSTEM AND METHOD FOR INCREASING A FEEDBACK DETECTION RATE IN AN AUDIO SYSTEM  
A system and method for removing feedback noise in an audio system includes an analyzing unit, which may utilize FFT processing and Feedback signal detection, and an adaptive feedback cancellation...
US20110164762 AUDIO FEEDBACK SUPPRESSION DEVICE AND METHOD FOR SUPPRESSING AUDIO FEEDBACK  
An audio feedback suppression device is provided that outputs a sound while changing a phase so as not to generate audio feedback without performing a relatively complicated process. A phase...
US20090316923 MULTICHANNEL ACOUSTIC ECHO REDUCTION  
A multichannel acoustic echo reduction system is described herein. The system includes an acoustic echo canceller (AEC) component having a fixed filter for each respective combination of...
US20140153741 AUDIO ADJUSTING METHOD AND ACOUSTIC PROCESSING APPARATUS  
An acoustic processing apparatus and an audio adjusting method for the acoustic processing apparatus are provided. The acoustic processing apparatus is electrically connected with a microphone and...
US20120275622 Electronically compensated micro-speakers  
Electronics for altering the audio frequency response of a micro-speaker without modifying the micro-speaker itself are used to provide a selected frequency response of the micro-speaker. The...
US20110293100 AUDIO AMPLIFIER PERFORMANCE WHILE MAINTAINING USB COMPLIANCE AND POWER DOWN PROTECTION  
An apparatus comprises a first audio amplifier circuit configured to provide an analog audio signal and an analog switch circuit including a first input configured to receive the analog audio...
US20080273716 Feedback Sound Eliminating Apparatus  
A control unit gives acoustic environment instruction data to a picked up sound directionality control unit and an adaptive filter. According to this, the picked up sound directionality control...
US20110091048 Method for virtual bass synthesis  
This invention relates to a method for virtual bass synthesis. The low frequency signal is attained by applying a low pass filter to the original. In order to reduce the operations, process of...
US20100020984 SIGNAL PROCESSING SYSTEM AND METHOD  
A signal processing system comprises a microphone (20), a subtractor (22) arranged to receive an output of the microphone (20), an amplifier G arranged to receive an output of the subtractor (22),...
US20090116661 MIXER WITH ADAPTIVE POST-FILTERING  
A noise reduction system includes multiple transducers that generate time domain signals. A transforming device transforms the time domain signals into frequency domain signals. A signal mixing...
US20120281855 ACOUSTIC FEEDBACK SUPPRESSION APPARATUS, MICROPHONE APPARATUS, AMPLIFIER APPARATUS, SOUND AMPLIFICATION SYSTEM, AND ACOUSTIC FEEDBACK SUPPRESSION METHOD  
An acoustic feedback suppression apparatus includes an amplitude measurement section for measuring the amplitude of a sound signal input from a microphone, an amplitude attenuation section for...
US20060215851 Method and apparatus for identifying a feedback frequency in a signal  
A system and method for analyzing a signal to identify one or more candidate frequencies that may have a potential feedback problem. An electronic circuit for identifying feedback in an audio...
US20070297627 Device and method for controlling the step size of an adaptive filter  
The determination of a suitable step size for controlling the adaptation of a filter of an acoustic feedback compensator especially for hearing aids is to be improved. A step size controller is...
US20090175465 INTERFERENCE SIGNAL REMOVING APPARATUS AND RF RECEIVER USING THE SAME  
An interference signal removing apparatus of a radio frequency (RF) receiver includes a low noise amplification unit which performs low noise amplification, a feedback processing unit which...
US20070172080 Acoustic feedback suppression  
A device (1) for acoustic feedback compensation comprises an adaptive filter (4), an adjustment unit (5) for adjusting coefficients of the adaptive filter, a combination unit (3) for subtracting...
US20050036632 Method and apparatus to reduce entrainment-related artifacts for hearing assistance systems  
A system providing method and apparatus to detect occurrence of an entrainment artifact and address it. The system analyzing a feedback canceller filter for certain characteristics that are...
US20060215852 Method and apparatus for identifying feedback in a circuit  
A system and method for analyzing a signal to monitor the dynamics of its magnitude and frequency characteristics over time. An electronic circuit for identifying feedback in an audio signal,...
US20140294198 FEEDBACK CANCELLATION FOR VEHICLE COMMUNICATIONS SYSTEM  
The present disclosure relates to a system and method of cancelling feedback in a vehicle communications system. The system and method may adjust a phase and a polarity of the microphone signal to...
US20150124998 MULTI-BAND HARMONIC DISCRIMINATION FOR FEEDBACK SUPRESSION  
A method and audio signal processor for detecting feedback in an electrical amplification system divides a frequency spectrum into a plurality of frequency bands, classifies a tone present in an...
US20100166213 Anti-Feedback Device and Anti-Feedback Method  
An anti-feedback device includes an anti-feedback filter provided in a closed loop, The anti-feedback device down-samples a signal of specific band selected from an output signal of an adaptive...
US20110051954 SIGNAL CONDITIONER WITH SUPPRESSION OF INTERFERING SIGNALS  
A semiconductor die with an integrated circuit providing a signal conditioner (106) for a capacitive transducer (105), comprising: a gain stage (101) configured to receive an analogue transducer...
US20100172513 Electronic Signal Processor  
An electronic signal processor for processing signals includes a complex first filter, one or more gain stages and a second filter. The first filter is characterized by a frequency response curve...

Matches 1 - 50 out of 61 1 2 >