Fig. 6
From: An acoustic echo canceller optimized for hands-free speech telecommunication in large vehicle cabins
The Winer filter (\(\widehat{h}\)[n]) coefficients after the AEC adapted to 10 HINT sentences read by the far end in an FM928 truck, engine off. The end-to-end delay corresponds to the physical distance between the microphone and the loudspeaker. The coefficients become sparse after 50 ms indicating that 50 ms is an optimal length for \(\widehat{h}\)[n] in this AEC setup