Systems and methods for adaptive noise cancellation

Details Systems and methods for adaptive noise cancellation Systems and methods for adaptive noise cancellation

2007-07-24

2007-07-24

Chin, Vivian (Department: 2615)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

C381S094100, C381S071110, C381S071120, C381S189000, C181S296000, C181S158000

Reexamination Certificate

active

10171293

ABSTRACT:
A system (400) for reducing non-acoustic noise includes a primary sensor (420), at least one secondary sensor (410), a filter (415), and a summation unit (425). The primary sensor (420) measures pressure and produces a primary pressure signal. The at least one secondary sensor (410) measures pressure and produce a secondary pressure signal. The filter (415) processes the secondary pressure signal to produce a filtered pressure signal. The summation unit (425) subtracts the filtered pressure signal from the primary pressure signal to reduce non-acoustic noise in the primary pressure signal.

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