Wind noise reduction circuit, wind noise reduction method and the audio signal processing circuit using the same, electronic equipment

摘要

PROBLEM TO BE SOLVED: To accurately detect wind noise.SOLUTION: A wind noise reduction circuit 100 reduces wind noise of an L-channel audio signal S3L and an R-channel audio signal S3R that are obtained by an L-channel microphone 2L and an R-channel microphone 2R, respectively. A high-pass filter 110 removes low-frequency components of the L-channel audio signal S3L and the R-channel audio signal S3R. A control unit 130 includes a subtractor for detecting that generates a difference component between the L-channel audio signal S3L and the R-channel audio signal S3R, and controls a cut-off frequency Fc of the high-pass filter 110 on the basis of the difference component.