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Nonlinear loudspeaker compensation for hands free acoustic echo cancellation

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2 Author(s)
Birkett, A.N. ; Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont., Canada ; Goubran, R.A.

Loudspeaker nonlinearity at high volumes limits the achievable echo cancellation performance in linear acoustic echo cancellers. A new nonlinear adaptive filter for improving the echo cancellation performance at high volumes for hands free telephones is proposed. Experimental measurements show that an echo cancellation improvement of >8 dB can be obtained at high volumes as compared to a linear adaptive filter

Published in:

Electronics Letters  (Volume:32 ,  Issue: 12 )