Variable step-size based method for acoustic feedback modeling and neutralization in active noise control systems

被引：28

作者：

Akhtar, Muhammad Tahir ^{[1
]}

Mitsuhashi, Wataru ^{[2
]}

机构：

[1] Univ Electrocommun, CFSE, Chofu, Tokyo 1828585, Japan

[2] Univ Electrocommun, Dept Informat & Commun Engn, Chofu, Tokyo 1828585, Japan

来源：

APPLIED ACOUSTICS | 2011年 / 72卷 / 05期

关键词：

Active noise control; FxLMS algorithm; Variable step-size; Acoustic feedback path modeling; Multichannel ANC systems; LMS ALGORITHM;

D O I：

10.1016/j.apacoust.2010.12.003

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

This paper investigates the issue of the acoustic feedback during online operation of active noise control (ANC) systems. In the existing approach, two FIR filters are used for this task: adaptive for feedback path modeling (FBPM) and fixed for feedback neutralization (FBN). Previously, a simplified method is proposed where these two tasks of modeling and neutralization have been combined into one feedback path modeling and neutralization (FBPMN) adaptive filter. Here we introduce an intuition based variable step size (VSS) parameter, for LMS equation of FBPMN filter. This VSS is motivated from the fact that the error signal of FBPMN filter contains a disturbance-component that is decreasing in nature. The computer simulations are carried out for single-channel and multichannel ANC systems. It is demonstrated that the proposed method achieves better performance than the existing methods. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：297 / 304

页数：8

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