Title :
A New Variable Threshold Based Active Noise Control Systems for Improving Performance
Author :
Babu, P. ; Krishnan, A. ; Saravanan, V.
Author_Institution :
Dept. of ECE, K.S. Rangasamy Coll. of Technol., Tiruchengode, India
Abstract :
Several approaches have been introduced in literature for active noise control (ANC) systems. Since FxLMS algorithm appears to be the best choice as a controller filter, researchers tend to improve performance of ANC systems by enhancing and modifying this algorithm. In this paper, the existing FxLMS algorithm is modified which provides a new structure for improving the tracking performance and convergence rate. The secondary signal y(n) is dynamically thresholded by wavelet transform to improve tracking. The convergence rate is improved dynamically by varying the step size of the error signal.
Keywords :
Acoustic noise; Active noise reduction; Adaptive filters; Control systems; Low-frequency noise; Microphones; Noise cancellation; Noise generators; Noise level; Phase noise; FxLMS algorithm; active noise control; dynamic step size; soft threshold; wavelet transform;
Conference_Titel :
Advances in Computer Engineering (ACE), 2010 International Conference on
Conference_Location :
Bangalore, Karnataka, India
Print_ISBN :
978-1-4244-7154-6
DOI :
10.1109/ACE.2010.48
