Sharp directive beamforming using microphone array and planar reflector
Kenta Niwa, Yusuke Hioka, Sumitaka Sakauchi, Ken’ichi Furuya, Yoichi Haneda · Nippon Onkyo Gakkaishi/Acoustical science and technology/Nihon Onkyo Gakkaishi · 2013
A method for sharp directive beamforming using a reflector is proposed. The method involves physically varying the transfer functions and the spatial correlation matrix by placing a planar reflector near a linear microphone array. We confirmed through experiments that the proposed method was effective for increasing the spatial nulls and minimizing the power of interference in the beamforming output and consequently achieving sharp directivity.