Scott A Mehrens

US Patent:

20110317848, Dec 29, 2011

Filed:

Jun 23, 2010

Appl. No.:

12/822176

Inventors:

Plamen A. Ivanov - Schaumburg IL, US
Scott A. Mehrens - Shoreline WA, US
Kevin J. Bastyr - St. Francis WI, US
Joel A. Clark - Woodridge IL, US

Assignee:

MOTOROLA, INC. - Schaumburg IL

International Classification:

H04B 15/00

US Classification:

381 942

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-band 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-band 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.

US Patent:

20150172816, Jun 18, 2015

Filed:

Dec 10, 2014

Appl. No.:

14/566281

Inventors:

- Mountain View CA, US
Scott A. Mehrens - Shoreline WA, US
Kevin J. Bastyr - St. Francis WI, US
Joel Anthony Clark - Woodridge IL, US

International Classification:

H04R 3/04
H04R 1/08

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.