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| Number | Title | Issue Date |
| 8189799 | System 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 |
| 8184819 | Microphone 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 |
| 8170225 | Method 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 |
| 8170226 | Acoustic 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 |
| 8160263 | Noise 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 |
| 8155332 | Method 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 |
| 8155333 | Active 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 |
| 8150053 | Method 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 |
| 8116472 | Noise 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 |
| 8111832 | Method 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 |
| 8111833 | Method 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 |
| 8107637 | Signal 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 |
| 8094828 | Sound 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 |
| 8085942 | Audio 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 |
| 8077873 | System 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 |
| 8073148 | Sound 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 |
| 8064611 | Uplink 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 |
| 8041047 | Plug, 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 |
| 8041048 | Electromagnetically-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 |
| 8019089 | Removal 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 |
| 8019090 | Active 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 |
| 7995769 | Sound 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 |
| 7853024 | Active 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 |
| 7787636 | Filtering 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 |
| 7773759 | Dual 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 |
| 7706546 | Computer-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 |
| 7613307 | Active 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 |
| 7567677 | Noise 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 |
| 7492910 | Active 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 |
| 7450725 | Digital 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 |
| 7430255 | Impulse 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 |
| 7418102 | Broad-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 |
| 7386135 | Cardioid 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 |
| 7376557 | Method 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 |
| 7370829 | Method 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 |
| 7366309 | Robot 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 |
| 7357220 | Systems 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 |
| 7353908 | Method 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 |
| 7352870 | Active 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 |
| 7352874 | Apparatus 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 |