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Electrical Audio Signal Processing Systems And Devices > Acoustical Noise Or Sound Cancellation Acoustical Noise Or Sound CancellationAcoustical Noise Or Sound Cancellation patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.11/08/07 - 20070258599 - Noise removal for electronic device with far field microphone on console Reduction of noise in a device having a console with one or more microphones and a source of narrow band distributed noise located on the console is disclosed. A microphone signal containing a broad band distributed desired sound and narrow band distributed noise is divided amongst a plurality of frequency ... 10/04/07 - 20070230712 - Telephony device with improved noise suppression The present invention relates to a telephony device comprising a near-mouth microphone (M1) for picking up an input acoustic signal including the speaker's voice signal (S1) and an unwanted noise signal (N1,D1), a far-mouth microphone (M2) for picking up an unwanted noise signal (N2,D2) in addition to the near-end speaker's ... 09/27/07 - 20070223714 - Open-air noise cancellation system for large open area coverage applications A variety of open-air noise cancellation systems are disclosed. The systems are configured to suit the needs of the particular application, for example, an open-air sound wall installation, an open-air enclosure for a quiet area, or a window/door treatment application. A particular system may a digital-based processing architecture having a ... 07/26/07 - 20070172073 - Apparatus and method of reducing noise by controlling signal to noise ratio-dependent suppression rate An apparatus for reducing a noise signal of a speech signal in a speech recognizer, the apparatus estimating a signal to noise ratio for each frequency band of the speech signal, applying a noise suppression rate based on the estimated signal to noise ratio, and reducing the noise signal of ... 07/12/07 - 20070160223 - Method and apparatus for noise canceling headphones An invention is described for a personal noise canceling system that consists of noise canceling headphones, a noise cancellation electronics module and a personal computing device. One embodiment of the invention places the noise canceling electronics module in a USB connector fob, which serves as a personal computing device, and ... 07/05/07 - 20070154026 - Mute circuit for eliminating noise during power off and electronic device using the same A mute circuit for eliminating noise during power off and an electronic device using the mute circuit are provided. The electronic device includes a power circuit, an audio processing circuit, a speaker, a micro control unit, and a mute circuit. The audio processing circuit is electrically connected to the speaker, ... 07/05/07 - 20070154025 - Noise elimination circuit for audio equipment A noise elimination circuit of a audio output device includes a sound card for receiving a digital audio signal and transforming it to an analog audio signal; an audio reproduction apparatus such as a audio output device connected to the sound card for receiving the analog audio signal; a power ... 06/28/07 - 20070147627 - Multiplexed microphone signals with multiple signal processing paths A multiplexed microphone signal with multiple signal processing paths is disclosed. Each signal processing path has it own priority and other characteristics. A signal path is selected based on the application of the processed signal. Similar processes within different paths may be shared to reduce computation workload. ... 06/14/07 - 20070133815 - Apparatus and method for cancellation of partially overlapped crosstalk signals The present invention is related to a partially overlapped single-carrier crosstalk signal cancellation method and an apparatus using the same. For this purpose, the present invention provides a crosstalk canceller including a pre-processor for frequency down-shifting an input signal, a crosstalk signal cancellation module for canceling the crosstalk signal by ... 06/14/07 - 20070133814 - Joint space-time optimum filter (jstof) using cholesky and eigenvalue decompositions A filter for reducing co-channel interference within a communications receiver may include a multi-channel, space-time filter circuit that filters n signal parts that have been split from a communications signal by jointly estimating space-time filter weights and multi-channel impulse responses (CIRs) based upon Cholesky and eigenvalue decompositions. The filter may ... 05/03/07 - 20070098183 - Acoustic signal reproduction apparatus A reproduction apparatus includes an acoustic signal generator which generates an acoustic signal, first sound pressure detection points located at N points in an audible area to detect sound pressure signals, N+1 control sound wave generators each of which emits a sound wave based on the acoustic signal to generate ... 03/22/07 - 20070064958 - Diffuser and speaker using the same A spherical wave generating diffuser positioned in front of the sound emission side of a sound source. The diffuser comprises an inner horn and an outer horn positioned concentrically around the inner horn. The diffuser generates pseudo-spherical waves centered on the inner horn because the emission speed of the sound ... 02/22/07 - 20070041588 - Motor operation noise elimination circuit of portable multimedia player A motor operation noise elimination circuit of a portable multimedia player is provided, in which a first sound sensor is utilized to sense a first sound signal generated by motor operation during recording and a second sound signal input in the portable multimedia player for recording. Then the first sound ... 02/15/07 - 20070036367 - Apparatus and method of reducing noise of earphones, noise reducing earphones, and a portable audio reproducing apparatus having the same An apparatus and method of reducing noise in a portable audio reproducing apparatus using earphones. The apparatus includes an earphone unit having a speaker unit and a microphone to output an audio signal and to generate anti-noise with respect to external noise, and a circuit unit to compensate a frequency ... 01/04/07 - 20070003072 - Ambient noise canceling physiological acoustic monitoring system & method The present invention is an ambient noise canceling physiological acoustic monitoring system and method. The system and method utilizes a plurality of microphones to collect input data including ambient noise signals, bed frame noise signals and patient respiratory and cardiac data signals. The system and method cancels the ambient noise ... 01/04/07 - 20070003071 - 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 predicted noise signal by applying an estimation ... 12/21/06 - 20060285697 - Open-air noise cancellation for diffraction control applications A variety of open-air noise cancellation systems are disclosed. The systems are configured to suit the needs of the particular application, for example, a sound wall installation, a seat or chair headrest application, a patio umbrella installation, or a window/door treatment application. A particular system may utilize an analog-based or ... 12/14/06 - 20060280314 - Digital amplifier and switching power supply To provide a digital amplifier and a switching power supply which are effective to realize a noise level required for a high grade and output digital amplifier and a switching power supply. In an embodiment, a noise component extraction circuit is coupled to the output stage of a D-class driver. ... 11/30/06 - 20060269078 - Vehicular active noise/vibration/sound control system, and vehicle incorporating such system An active noise/vibration/sound control system for a vehicle has an ANC (active noise control apparatus), an AVC (active vibration control apparatus), and an ASC (active sound control apparatus). To prevent the ANC, the AVC, and the ASC from interfering with each other and hence to prevent vehicle cabin environment of ... 11/30/06 - 20060269077 - Fan noise control apparatus A fan noise control apparatus is provided to facilitate the reduction of noise. According to the preferred embodiments, an acoustically transparent portion is provided to permit noise from one source to pass through to interact and cancel with another noise. ... 11/09/06 - 20060251267 - 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 acoustic control cell controls a coming noise such ... 11/09/06 - 20060251266 - Adaptive personal active noise system An improved active noise reduction system which has a transducer, an electro-acoustic sensing means including adjacent to the transducer, an attenuation means with electro-acoustic sensing means to attenuate selected sound frequencies, said system utilizing both feed forward control means and feedback control means comprising a heteronomous electronic controller with algorithmic ... 10/05/06 - 20060222184 - Multi-channel adaptive speech signal processing system with noise reduction An adaptive signal processing system eliminates noise from input signals while retaining desired signal content, such as speech. The resulting low noise output signal delivers improved clarity and intelligibility. The low noise output signal also improves the performance of subsequent signal processing systems, including speech recognition systems. An adaptive beamformer ... 09/14/06 - 20060204015 - Noise cancellation module A computer system having a noise cancellation module and a method of canceling noise using a noise cancellation module in a computer system are described. The computer system includes a processor for controlling operation of the computer system, a noise cancellation module coupled to the processor, and a memory coupled ... 06/15/06 - 20060126859 - Sound system improving speech intelligibility The invention relates to a method and a device for improving speech intelligibility for a listener receiving a speech signal output through a transducer in a noisy environment, where in the speech signal prior to the output one or more parameters have been modified in a signal processor corresponding to ... 04/13/06 - 20060078131 - Sonic exciter An apparatus for sonic excitation of a surface includes a transparent pane. A sidewall structure cooperates with the pane to define an open cavity facing the surface. At least one speaker is positioned to introduce sound to the cavity. Sound canceling means are provided for at least partially canceling transmission ... 03/30/06 - 20060067538 - Acoustic device with a noise reduction unit An acoustic device includes a resonance chamber and a noise reduction unit. The noise reduction unit serves to combat noise in the resonance chamber, and includes first and second electro-acoustic transducers, a controller, and a sound-absorbing member. The first electro-acoustic transducer generates a first electrical signal that corresponds to the ... 02/23/06 - 20060039569 - Noise canceling toilet A toilet acoustic noise canceling system comprising of at least one reference microphone (155) which is operatively connected to a digital signal processing circuit (240) and at least one speaker (150) which is operatively connected to same digital signal processing circuit. Digital signal processing circuit employs signal from said microphone ... 11/17/05 - 20050254663 - Electronic sound screening system and method of accoustically impoving the environment A flexible apparatus for, and method of, acoustically improving an environment permits manual adjustment by one or more local or remote users using a simple graphical interface and automatic adjustment of the system parameters once the manual adjustment is performed. The inputs are weighted by distance from the physical apparatus. ... ### FreshPatents.com Support |