Method and device for reducing acoustic feedback
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United States of America Patent
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May 31, 2016
Grant Date -
Oct 23, 2014
app pub date -
Oct 17, 2012
filing date -
Nov 15, 2011
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Abstract
Acoustic feedback in an audio device is reduced or eliminated via a feedback compensator. The feedback compensator disposes of at least one adaptive filter whose adaptation is governed by a step-size parameter μ. A step-size parameter μ of the adaptive filter is set at a high level to eliminate acoustic feedback and the parameter μ is decreased when a critical excitation signal is detected. This way to proceed allows for efficient elimination of feedback whistling while required environment signals are retained.
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