1
Richard L Zinser Jr, Seth D Silverstein, Steven R Koch: Two-input crosstalk-resistant adaptive noise canceller. General Electric Company, Geoffrey H Krauss, James C Davis Jr, Marvin Snyder, March 10, 1987: US04649505 (174 worldwide citation)

A two-input crosstalk-resistant adaptive noise canceller receives a primary input signal including a desired speech signal portion and an undesired noise signal portion and also receives a reference input signal having a reference noise input portion and a crosstalk speech portion. The canceller has ...


2
Tatsumasa Yoshida, Ryoichi Miyamoto, Masashi Takada, Katsuya Suzuki: Adaptive noise canceller. Oki Electric, Christopher H Lynt, Spencer Frank & Schneider, December 5, 1995: US05473702 (96 worldwide citation)

An adaptive filter estimates the noise component in a primary audio signal by convolving a secondary audio signal with a set of coefficients. The estimated noise component is subtracted from the primary audio signal to produce an output signal. During steady-state operation, the adaptive filter coef ...


3
Tooru Sasaki, Masashi Ohkubo: Noise reducing microphone apparatus. Sony Corporation, Jay H Maioli, June 29, 1999: US05917921 (89 worldwide citation)

A noise reducing microphone apparatus having an adaptive noise canceller which has a primary input and a reference input and in which the reference input is subtracted from the primary input through an adaptive filter and the adaptive filter is adaptively controlled by an output signal resulted from ...


4
Paul L Feintuch: Active adaptive noise canceller without training mode. Hughes Aircraft Company, Wanda K Denson Low, May 26, 1992: US05117401 (82 worldwide citation)

An active adaptive noise canceller that inserts delays in the weight update logic of an adaptive filter employed by the canceller to make the filter stable. It has been found that there is a great deal of flexibility regarding the selection of the delay values. This insensitivity permits designing t ...


5
Allen K Lo, Paul L Feintuch: Multiple adaptive filter active noise canceller. Hughes Aircraft Company, W K Denson Low, June 13, 1995: US05425105 (79 worldwide citation)

An active adaptive noise canceller that does not require a training mode and operates over an extended noise bandwidth. The canceller partitions the noise bandwidth into frequency sub-bands, and multiple adaptive filter channels are employed, one for each sub-band, to cancel noise energy in the resp ...


6
Jeff Vanden Berghe, Jan Wouters: Hearing aid with adaptive noise canceller. GN ReSound, Michael J Bolan, Bingham McCutchen, May 3, 2005: US06888949 (42 worldwide citation)

A noise reduction system for a sound reproduction system, in particular for hearing aids, comprises a primary and a secondary microphone for producing input signals in response to sound in which a noise component is present. The system has a first signal processing section comprising a fixed filter ...


7
Ronald John Vanderhelm, Wenkai Zhong, Peter R H McConnell: Adaptive noise reduction system for a wireless receiver. Sierra Wireless, Thelen Reid & Priest, November 22, 2005: US06968171 (27 worldwide citation)

A receiver with reduced near field noise is described. The receiver has a far range receiving section configured to sense a desired signal that includes near field noise. The receiver further includes a near range receiving section configured to sense a near field noise reference signal. An adaptive ...


8
Clinton W Moulds III: Adaptive noise cancelling for magnetic bearing auto-balancing. Westinghouse Electric, March 27, 1990: US04912387 (25 worldwide citation)

A separate adaptive noise canceller receiving a reference input of a rotor speed synchronization pulse is connected in the X and Y axis positional control loops of a magnetic bearing utilized to position a rotor suspended thereby. The output of the noise canceller is self-adjusting by the inclusion ...


9
Ilan Reuven: Adaptive noise canceller. Orckit Communication, Darby & Darby, September 4, 2001: US06285718 (20 worldwide citation)

This invention discloses an apparatus for transmission of high speed data over communication channels, the apparatus including a modulator operative to modulate an outgoing stream of digital data, thereby to generate an outgoing signal, and a demodulator operative to demodulate an incoming signal, t ...


10
Paul L Feintuch, Allen K Lo: Non-integer sample delay active noise canceller. Hughes Aircraft Company, W K Denson Low, February 7, 1995: US05388080 (19 worldwide citation)

An active adaptive noise canceller that inserts delays into the weight update logic of an adaptive filter to keep the filter stable. The noise and residual noise are sensed and the respective sensor signals are digitized at a given sample rate for processing in the adaptive filter. To eliminate the ...