Title :
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
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;
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
DOI :
10.1109/SSP.2009.5278609
