Microphone calibration for active noise control system

Details Microphone calibration for active noise control system Microphone calibration for active noise control system

2006-11-21

2006-11-21

Pendleton, Brian T. (Department: 2615)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Within cabin or compartment of vehicle

C381S071800

Reexamination Certificate

active

07139400

ABSTRACT:
An active noise control system (100) and method compensates for changes in a microphone output to maintain accurate noise control. A calibration signal reflecting a desired microphone output is generated and stored in an active noise control module (106). During operation, the active noise control module (106) compares an actual microphone output signal with the calibration signal and compensates for any changes in the actual output signal before any noise compensation or cancellation function occurs.

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patent: 2002/0146136 (2002-10-01), Carter

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