Microphone array response to speaker movements

Matched ltering and adaptive beamforming are both necessary for e cient speech dereverberation and noise reduction by microphone arrays. This can be achieved by the identi cation of impulse responses. In this contribution, we show that adaptive microphone arrays are sensitive to identi cation errors of impulse responses, particularly due to speaker movements. We prove that adjusted matchedltering and permanent tracking of impulse responses are also necessary. The proposed microphone array responds well to these requirements under realistic conditions.