Patent ID: 11948546
Assignee: CIRRUS LOGIC INC.
Field: Other consumer goods (Other fields)
Classification: CPC G  H | IPC G  H

Claim 18:
19. A method of canceling effects of ambient noise, the method comprising:
sensing the ambient noise with an acoustic sensor of an adaptive noise-canceling system to generate a noise reference signal;
generating an anti-noise signal with a feed-forward filter to reduce the presence of the ambient noise, wherein the feed-forward filter has a response controlled by a set of first coefficients;
providing the anti-noise signal to an output electroacoustic transducer;
measuring a characteristic of an acoustic environment of the adaptive noise-canceling system with a measurement subsystem;
classifying the characteristic of the acoustic environment of the adaptive noise-canceling system by analyzing an output of the measurement subsystem; and
controlling a response of the feed-forward filter by selecting the set of first coefficients in conformity with an output of the classifier.