TY - GEN

T1 - An improved probe noise approach for acoustic feedback cancellation

A1 - Guo,Meng

A1 - Jensen,Søren Holdt

A1 - Jensen,Jesper

AU - Guo,Meng

AU - Jensen,Søren Holdt

AU - Jensen,Jesper

PB - IEEE Press

PY - 2012/6/17

Y1 - 2012/6/17

N2 - The perhaps most challenging problem in acoustic feedback cancellation using adaptive filters is the bias problem. It is well-known that a probe noise approach can effectively prevent this problem. However, when the probe noise must be<br/>inaudible and the steady-state error of the adaptive filter must be unchanged, this approach causes a significantly decreased convergence rate of the adaptive filter, and might thereby be less useful in practical applications. In this work, we propose a new probe noise approach which significantly increases the convergence rate while maintaining the steady-state error of the adaptive algorithm in a multiple-microphone and single-loudspeaker audio system. This is obtained through a specifically designed probe noise signal and a corresponding probe noise enhancement strategy. We show the effects of the proposed probe<br/>noise approach by deriving analytical expressions for its system behavior, and through a simulation experiment in an acoustic feedback cancellation system.

AB - The perhaps most challenging problem in acoustic feedback cancellation using adaptive filters is the bias problem. It is well-known that a probe noise approach can effectively prevent this problem. However, when the probe noise must be<br/>inaudible and the steady-state error of the adaptive filter must be unchanged, this approach causes a significantly decreased convergence rate of the adaptive filter, and might thereby be less useful in practical applications. In this work, we propose a new probe noise approach which significantly increases the convergence rate while maintaining the steady-state error of the adaptive algorithm in a multiple-microphone and single-loudspeaker audio system. This is obtained through a specifically designed probe noise signal and a corresponding probe noise enhancement strategy. We show the effects of the proposed probe<br/>noise approach by deriving analytical expressions for its system behavior, and through a simulation experiment in an acoustic feedback cancellation system.

U2 - 10.1109/SAM.2012.6250548

DO - 10.1109/SAM.2012.6250548

SN - 978-1-4673-1070-3

BT - Proc. 7th, Sensor Array and Multichannel Signal Processing Workshop (SAM), 2012 IEEE

T2 - Proc. 7th, Sensor Array and Multichannel Signal Processing Workshop (SAM), 2012 IEEE

T3 - I E E E Workshop on Sensor Array and Multichannel Signal Processing

T3 - en_GB

SP - 497

EP - 500

ER -