Online acoustic feedback path modeling in multi-channel active noise control systems using Variable Step-Size algorithm

Author

Habib, Tania ; Tufail, Muhammad

Author_Institution

Signal Process. & Speech Commun. Lab., Graz Univ. of Technol., Graz, Austria

fYear

2009

Firstpage

177

Lastpage

180

Abstract

In this paper we have investigated the effects of acoustic feedback on multi-channel ANC system. The presence of strong acoustic feedback degrades the convergence speed of the ANC filters, and in worst case the multi-channel ANC system may become unstable. The acoustic feedback path can be modeled offline, but in most applications it is time varying, hence it needs to be modeled online when ANC is in operation. Here, we propose a Variable Step Size based method for multi-channel ANC systems with online acoustic feedback path modeling. The computer simulations are carried out, which demonstrate the effectiveness of the proposed method, in comparison with the existing methods for 1 times 2 times 2 ANC system.

Keywords

acoustic signal processing; active noise control; convergence; feedback; filtering theory; ANC filters; convergence speed; multichannel active noise control systems; online acoustic feedback path modeling; variable step size; variable step-size algorithm; Acoustic applications; Acoustic noise; Active noise reduction; Application software; Computer simulation; Control system synthesis; Convergence; Degradation; Feedback; Filters; Adaptive filtering; acoustic feedback; multi-channel active noise control; online feedback-path modeling;

fLanguage

English

Publisher

ieee

Conference_Titel

Statistical Signal Processing, 2009. SSP '09. IEEE/SP 15th Workshop on

Conference_Location

Cardiff

Print_ISBN

978-1-4244-2709-3

Electronic_ISBN

978-1-4244-2711-6

Type

conf

DOI

10.1109/SSP.2009.5278609

Filename

5278609