FREQUENCY DOMAIN ACTIVE NOISE CANCELLATION SYSTEM AND METHOD

摘要

A frequency domain active noise cancellation system and method are provided that achieves superior active reduction of offending noise sources. The frequency-domain active noise cancellation identifies and cancels one or more of the strongest relatively narrow frequency bands in the power spectra of the offending sound sources.

主权项

1. An active noise cancellation system, comprising:
one or more sensors that measure a sound source; an active noise cancellation system connected to the one or more sensors, the active noise cancellation system having an estimator that estimates, in a frequency domain, one or more spectral peaks of the sound source based on the spectrum of the measured sound and a generator that generates a noise cancellation signal that cancels the one or more spectral peaks of the sound source; and one or more sound transducers that generate the noise cancellation sound that cancels the one or more spectral peaks of the sound source.