METHOD AND DEVICE FOR REDUCING ACOUSTIC FEEDBACK

摘要

The present invention relates to a reduction of acoustic feedback of an audio device via a feedback compensator (14). The feedback compensator (14) disposes of at least one adaptive filter whose adaptation is governed by a step-size parameter mu. The invention proposes setting a step-size parameter mu of said adaptive filter at a high level to eliminate acoustic feedback and decreasing said parameter mu when a critical excitation signal is detected. This way to proceed allows for efficient elimination of feedback whistling while required environment signals are retained.