Title :
New adaptive IIR notch filter and its application to howling control in speakerphone system
Author :
Kuo, S.M. ; Chen, Jiann-Jong
Author_Institution :
Dept. of Electr. Eng., Northern Illinois Univ., Dekalb, IL, USA
fDate :
4/9/1992 12:00:00 AM
Abstract :
A new second order IIR adaptive notch filter which has a faster convergence rate was developed to control howling in a speakerphone system. Simulation results obtained using real hybrid and acoustic transfer functions show an 8-14 dB howling margin enhancement with this new technique.
Keywords :
adaptive filters; digital filters; notch filters; signal processing; acoustic transfer functions; adaptive IIR notch filter; convergence rate; howling control; real hybrid transfer functions; second order; speakerphone system;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920483
