公开(公告)号：US20240038211A1

公开(公告)日：2024-02-01

申请号：US17875364

申请日：2022-07-27

Applicant: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.

Inventor： John Bryan-Merrett ,  Mert Salahi ,  Wilbur Lawrence ,  Samuel P. Ebenezer ,  Rachid Kerkoud

IPC: G10K11/178

CPC classification number: G10K11/17885 ,  G10K11/17853 ,  G10K11/17881

Abstract: An adaptive noise-canceling system generates an anti-noise signal with a filter that has a response controlled by a set of coefficients selected from a collection of coefficient sets. The adaptive noise-canceling system includes an acoustic output transducer for reproducing a signal containing the anti-noise signal, a first microphone for measuring ambient noise at a first location to produce a first noise measurement signal, a second microphone for measuring the ambient noise at a second location to generate a second noise measurement signal, and an analysis subsystem for analyzing the first noise measurement signal and the second noise measurement signal. The adaptive noise-canceling system also includes a controller that selects the set of coefficients from the collection of coefficient sets according to a phase difference between the first noise measurement signal and the second noise measurement signal as determined by the analysis subsystem.