Time domain deconvolution for reproducing sound field in an ordinary room

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (4) : 115-120.

PENG Bo, ZHENG Sifa, LIAO Xiangning, LIAN Xiaomin

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Abstract

In order to reproduce a desired sound field in an ordinary room with reflection boundary, deconvolution of the desired sound field signals is neccessary to get the loudspeaker driving signals. In this research, a time-domain model used for sound field reproduction in a room is established. In the model, long-time deconvolution network is used to acquire high accuracy and avoid the time-domain aliasing effect at the same time. On account of the massive computation of the convolution process, fast filtering method is applied to improve the computational efficiency. The reproduction experiment of the interior noise in an acceleration vehicle indicates that the proposed time-domain model is able to implement the deconvolution of the sound pressure signals precisely and efficiently, and then implement the quantificational reproduction of the desired sound field in an ordinary room.

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sound field reproduction / unfree field / deconvolution / filter design / fast convolution

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PENG Bo, ZHENG Sifa, LIAO Xiangning, LIAN Xiaomin. Time domain deconvolution for reproducing sound field in an ordinary room[J]. Journal of Vibration and Shock, 2016, 35(4): 115-120

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