Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Counterwave generation control path
Reexamination Certificate
2007-09-18
2007-09-18
Chin, Vivian (Department: 2615)
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Counterwave generation control path
C381S071100, C381S071700, C381S071800, C381S071140
Reexamination Certificate
active
10407915
ABSTRACT:
A multi-channel active noise control system and method of reducing tonal noise emanating from a tonal noise source are disclosed. The system may include an adaptive controller, a plurality of loudspeakers driven by the loudspeaker, one or more microphones for generating one or more error signals to feedback to the adaptive controller and optionally a reference signal source to provide the adaptive controller with frequency information associated with the tonal noise source. The system and method of the present invention are applicable to any tonal noise source, including but not limited to axial fans.
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Gee Kent L.
Sommerfeldt Scott D.
Brigham Young University
Chin Vivian
Suthers Douglas
Thorpe North & Western LLP
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