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Class 381/71.1 - ACOUSTICAL NOISE OR SOUND CANCELLATION


Subclass of Class 381 - Electrical audio signal processing systems and devices
Definition: Subject matter, not elsewhere classifiable, comprising a
No. of patents: 247
Last issue date: 05/29/2012


1              
NumberTitleIssue Date
8189799System for active noise control based on audio system output
An active noise control (ANC) system is configured to generate at least one anti-noise signal configured to drive a speaker to generate sound waves to destructively interfere with an undesired sound present in a target space. The at least one anti-noise signal is ad...
05/29/2012
8184819Microphone array signal enhancement
A system and method facilitating signal enhancement utilizing an adaptive filter is provided. The invention includes an adaptive filter that filters an input based upon a plurality of adaptive coefficients, the adaptive filter modifying at least one of the adaptive ...
05/22/2012
8170225Method for adapting a vibration isolation system
The invention relates to a method for adapting a vibration isolation system as well as to an arrangement with a vibration isolation system. By constructive measures in the environment of the vibration isolation system, particularly plane-parallel surfaces areas are ...
05/01/2012
8170226Acoustic echo cancellation and adaptive filters
In one embodiment, a two-way telecommunication device may perform acoustic echo cancellation on incoming signals. An audio decoding module may produce an audio render signal. An audio capture interface may receive an audio capture signal. A short length adaptive fil...
05/01/2012
8160263Noise reduction by mobile communication devices in non-call situations
In a preferred embodiment, the invention is a mobile communication device having a digital signal processor (DSP), a speaker output node, a local audio source, and an analog front-end (AFE), wherein: (1) the DSP receives a first audio signal corresponding to sound c...
04/17/2012
8155332Method and apparatus for attenuating fan noise through turbulence mitigation
Some embodiments of the present invention provide a system that attenuates noise from a fan exhaust of a computer system. During operation, the system monitors the noise from the fan exhaust and calculates a frequency spectrum of the noise from the monitored noise. ...
04/10/2012
8155333Active noise control apparatus
An active noise control apparatus that controls by a control sound a noise which is output from a noise source, includes: a control sound generating section which inputs a control signal, and produce the control sound; a residual noise detecting section which detect...
04/10/2012
8150053Method and device for eliminating vibrations of a mechanical structure
The invention is a device and a method for eliminating vibrations of a mechanical structure with at least one electromechanical converter material that is actively connected to the mechanical structure and connected to an electrical circuit with at least one electri...
04/03/2012
8116472Noise control device
A noise control device reduces noises respectively arriving in a plurality of spaces which are acoustically independent from each other. The noise control device includes sound output devices, which are respectively provided in the plurality of spaces so as to respe...
02/14/2012
8111832Method of adjusting acoustic impedances for impedance-tunable acoustic segments
A method is provided for making localized decisions and taking localized actions to achieve a global solution. In an embodiment of the present invention, acoustic impedances for impedance-tunable acoustic segments are adjusted. A first acoustic segment through an N-...
02/07/2012
8111833Method of reducing residual acoustic echo after echo suppression in a “hands free” device
The method comprises, in the time domain, echo cancellation processing (40) by subtracting from the microphone signal a reference signal delivered by an adaptive circuit for modeling the acoustic coupling between the microphone (18) and the loudspeaker...
02/07/2012
8107637Signal processing device and signal processing method
A signal processing device includes: a filter processing unit configured to execute noise reduction operations by subjecting sound-collected signals from a sound-collecting unit to filtering processing based on preset filter properties and providing with signal prop...
01/31/2012
8094828Sound source separating apparatus and sound source separating method
There is disclosed a sound source separating apparatus (100) including: a sound pressure detecting unit which detects a sound pressure in which fluid sound generated due to fluctuations in fluid pressure and oscillation sound generated due to oscillation of a...
01/10/2012
8085942Audio apparatus and method for use in proximity to a magnetic resonance imaging system
An apparatus and method for presenting high-quality auditory stimuli, receiving patient communication and providing noise cancellation within the environment of magnetic resonance imaging (“MRI”) equipment. A microphone is positioned in a noise attenuated channe...
12/27/2011
8077873System for active noise control with adaptive speaker selection
An active noise control system generates an anti-noise signal to drive a first speaker group including at least one speaker to produce sound waves to destructively interfere with an undesired sound in at least one quiet zone. The active noise control system receives...
12/13/2011
8073148Sound processing apparatus and method
Disclosed is an apparatus and method for processing signals such as sound signals. The sound processing apparatus includes a sound signal input unit for receiving sound signals, a harmonic noise separator for separating a harmonic region and a noise region from the ...
12/06/2011
8064611Uplink noise cancellation
A system comprising audio logic adapted to convert captured sound into an audio signal. The system also comprises transmission logic which causes noise to be added to the audio signal. The system further comprises processing logic adapted to at least partially remov...
11/22/2011
8041047Plug, sound inputting and outputting apparatus, and noise cancel system
Herein disclosed a sound inputting and outputting apparatus for being connected to an external apparatus which includes a noise cancel signal production section, a storage section and a reproduction section, including: a first auricle mounting section; a second auri...
10/18/2011
8041048Electromagnetically-countered speaker systems and methods
The present invention relates to electromagnetically-countered speaker systems for generating acoustic sounds according to dynamic signals supplied thereto while minimizing irradiation of harmful electromagnetic waves therefrom. More particularly, the present invent...
10/18/2011
8019089Removal of noise, corresponding to user input devices from an audio signal
A noisy audio signal, with user input device noise, is received. Particular frames in the audio signal that are corrupted by user input device noise are identified and removed. The removed audio data is then reconstructed to obtain a clean audio signal. ...
09/13/2011
8019090Active feedforward disturbance control system
Noise effects in a signal for driving a plant are reduced by generating a reference signal from the error signal. A signal generator generates a reference signal for input to a finite impulse response (FIR) filter. The error signal is produced by differencing the tr...
09/13/2011
7995769Sound control apparatus of image forming apparatus
A sound control apparatus of image forming apparatus includes a sound-transmitting channel in which the sound in the image forming apparatus can be transmitted to the outside of the image forming apparatus, a sound-collecting portion which is provided at the sound-t...
08/09/2011
7853024Active noise control system and method
An Active Noise Control (ANC) for controlling a noise produced by a noise source may include an acoustic sensor (212) to sense a noise pattern and to produce a noise signal corresponding to the sensed noise pattern, an estimator (202) to produce a pred...
12/14/2010
7787636Filtering a microphone signal to remove noise components generated by a disk drive
A sound recording device includes a disk drive, a microphone, and a controller. The disk drive writes data on a rotatable data storage disk therein. The microphone generates a microphone signal which includes a desired sound component and a noise component from nois...
08/31/2010
7773759Dual microphone noise reduction for headset application
Improved vocal signals are obtained in headsets and similar devices by including a microphone inside a chamber formed at least in part by the wearer's ear. This second microphone provides a reduced noise input signal. The reduced noise signal is corrected by input f...
08/10/2010
7706546Computer-based onboard noise suppression devices with remote web-based management features
The present invention provides a method, apparatus, and computer implemented instructions for computer-based onboard noise suppression devices with remote web-based management features. The present invention detects noise within a computer. A noise canceling signal ...
04/27/2010
7613307Active sound reduction apparatus and active noise insulation wall having same
An active noise insulation wall includes an active sound reduction apparatus disposed on an upper end surface of a noise insulation wall. The active sound reduction apparatus comprises a combination of an active acoustic control cell and a sound tube. The active aco...
11/03/2009
7567677Noise reduction scheme for a computer system
A noise reduction scheme is incorporated into a computer system for reducing environmental background noise when a user is listening to audio output through a standard set of headphones. The noise reduction scheme utilizes the processing power of the computer system...
07/28/2009
7492910Active acoustic filter
A system for actively damping the low-frequency coloration of sound in a listening room is provided comprising an acoustic wave sensor, an acoustic wave actuator, and an electronic feedback controller. The listening room defines at least one mode of low-frequency co...
02/17/2009
7450725Digital filter modeling for active noise cancellation
An active noise cancellation system (20) includes digital modeling of the physical path that is compensated for using a digital filter (34). An initial estimate of the time domain response of the system (20) is achieved using inverse time domain...
11/11/2008
7430255Impulse noise suppression device
Digital audio data with error detection bits added thereto is inputted to an error detecting and correcting device (4). The correcting device (4) corrects an error when the error is detected in the digital audio data. The digital audio data outputted f...
09/30/2008
7418102Broad-band echo sounder
An echo sounder includes front and rear masses and a layered product of piezoelectric ceramics sandwiched therebetween, and a hollow space is formed in the front mass for defining a bending vibratory plate portion; a ring-shaped piezoelectric vibrator is accommodate...
08/26/2008
7386135Cardioid beam with a desired null based acoustic devices, systems and methods
An acoustic device is provided with first and second one or more acoustic elements to generate a first signal that includes mostly undesired audio and substantially void of desired audio, and a second signal that includes desired as well undesired audio respectively...
06/10/2008
7376557Method and apparatus of overlapping and summing speech for an output that disrupts speech
A privacy apparatus adds a privacy sound based on a speaker's own voice into the environment, thereby confusing listeners as to which of the sounds is the real source. This permits disruption of the ability to understand the source speech of the user by eliminating ...
05/20/2008
7370829Method and system for controlling helicopter vibrations
A method/system for controlling helicopter vibrations is provided that includes a vibration canceling force generator for actively generating a vibration canceling force. The system includes a resonant actuator having a natural resonant frequency and a resonant actu...
05/13/2008
7366309Robot
A robot includes first and second microphones and movable portions. The first microphone gathers a first sound reception signal by gathering mainly a target signal. The second microphone gathers a second reception sound signal by gathering mainly noise other than th...
04/29/2008
7357220Systems and methods for controlling acoustical damping
A control system (10) controls a variable acoustical damping device (20) disposed in a sound producing channel (5) of a vehicle engine (1). The control system includes a controller (12) and a selection device (14). The contr...
04/15/2008
7353908Method and system for attenuating noise from a cabinet housing computer equipment
An apparatus for attenuating noise emanating from a cabinet housing noise-generating equipment includes a frame including at least one support member configured to be mountable on the cabinet, proximate the noise-generating equipment, at least one noise attenuation ...
04/08/2008
7352870Active sound muffler and active sound muffling method
An active sound muffler for reducing a sound to be reduced as emitted from a sound source located at one of the opposite sides of a sound insulating wall and diffracted and transmitted to the other side, the muffler comprises a control loudspeaker arranged at the fr...
04/01/2008
7352874Apparatus for acoustically improving an environment and related method
The invention provides an apparatus and related method for acoustically improving an environment. In an embodiment of the invention, an apparatus comprises a partitioning means in the form of a curtain for producing a discontinuity in a sound conducting medium, such...
04/01/2008
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