Invention Application
- Patent Title: MICROPHONE INTERFERENCE DETECTION METHOD AND APPARATUS
- Patent Title (中): 麦克风干扰检测方法和装置
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Application No.: US14566281Application Date: 2014-12-10
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Publication No.: US20150172816A1Publication Date: 2015-06-18
- Inventor: Plamen A. Ivanov , Scott A. Mehrens , Kevin J. Bastyr , Joel Anthony Clark
- Applicant: Google Technology Holdings LLC
- Main IPC: H04R3/04
- IPC: H04R3/04 ; H04R1/08

Abstract:
A method and apparatus for detecting microphone interference includes first and second built-in microphones producing first and second microphone signals. A first filter bank creates first high-frequency-band and first low frequency-band signals from the first microphone signal. A second filter bank creates second high-frequency-band and second low-frequency-hand signals from the second microphone signal. A first measurement calculator determines a high-frequency-band energy value from the first high-frequency-band signal and the second high-frequency-hand signal when the first and second high-frequency-band signals' magnitudes exceeds predetermined thresholds. A second measurement calculator calculates a low-frequency-band energy value from the first low-frequency-band signal and the second low-frequency-band signal when the first and second low-frequency-band signals' magnitudes exceed predetermined thresholds. A logic control block, coupled to the first measurement calculator and the second measurement calculator, detects microphone interference and produces an output signal indicating microphone occlusion or wind noise.
Information query