Adaptive filtering exploiting band-limited property of sound field in the wave domain

Massive multichannel sound reproduction is necessary for highly immersive full-duplex communication. Efficient echo cancellation between massive loudspeakers and microphones is indispensable, and wave-domain adaptive filtering reduces the computational complexity drastically. We propose to further reduce this complexity by exploiting the band-limited property that the sound field has in the space-time-frequency representation. Experimental evaluations support the applicability of the proposed method.