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Convention Paper

Adaptive Equalizer for Acoustic Feedback Control

Authors: Favrot, Alexis; Faller, Christof

AES Convention 128 · Paper 8053 · May 2010

Abstract

Acoustic feedback is a recurrent problem in audio applications involving amplified closed loop systems. The goal of the proposed acoustic feedback control algorithm is to adapt an equalizer, applied to the microphone signal, to prevent feedback before the effect of it is noticeable. This is achieved by automatically decreasing the gain of an equalizer at frequencies where feedback likely will occur. The equalization curve is determined using information contained in an adaptively estimated feedback path. A computationally efficient implementation of the proposed algorithm, using short-time Fourier transform, is described.

Details

Published in
AES Convention 128
AES Convention
128
Paper number
8053
Publication date
May 6, 2010
Session subject
Room Acoustics, Sound Reinforcement, and Instrumentation
Affiliation
Illusonic LLC, Lausanne, Switzerland (See document for exact affiliation information.)
Type
Convention Paper