A simplified method for online acoustic feedback path modeling and neutralization in multichannel active noise control systems

Muhammad Tahir Akhtar, Masahide Abe, Masayuki Kawamata, Wataru Mitsuhashi

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The presence of strong acoustic feedback degrades the performance of active noise control (ANC) systems, and in the worst case the ANC system may become unstable. In this paper, we investigate additive-random-noise-based methods for online feedback path modeling and neutralization (FBPMN) in multichannel ANC systems. In existing methods, separate filters are used for each acoustic feedback path: one for online feedback path modeling (FBPM), and another for feedback path neutralization (FBPN). Furthermore, the existing method works well for predictable noise sources but its performance degrades for unpredictable sources. This paper attempts to solve these problems in multichannel ANC systems. The proposed method is a modification and extension of previous work for online FBPMN in single-channel ANC systems. In the proposed method, we combine the two tasks of FBPM and FBPN in one online FBPMN filter, and hence, the computational complexity of the proposed method is lower than existing methods. Computer simulations are carried out to demonstrate the effectiveness of the proposed method. It is shown that the proposed method achieves better performance than existing methods for both predictable and unpredictable noise sources. Furthermore, this improved performance is achieved at somewhat reduced computational complexity.

Original languageEnglish
Pages (from-to)1090-1099
Number of pages10
JournalSignal Processing
Volume89
Issue number6
DOIs
Publication statusPublished - Jun 1 2009

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Active noise control
Acoustics
Feedback
Control systems
Computational complexity

Keywords

  • Acoustic feedback
  • Adaptive signal processing
  • Multichannel active noise control
  • Online feedback path modeling

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Software
  • Signal Processing
  • Computer Vision and Pattern Recognition

Cite this

A simplified method for online acoustic feedback path modeling and neutralization in multichannel active noise control systems. / Akhtar, Muhammad Tahir; Abe, Masahide; Kawamata, Masayuki; Mitsuhashi, Wataru.

In: Signal Processing, Vol. 89, No. 6, 01.06.2009, p. 1090-1099.

Research output: Contribution to journalArticle

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