关键词: 声学, 声场重构, 波束形成, 鬼影, 重构精度

Abstract: The ghost images easily exist in the reconstruction of acoustic fields by the use of beamforming algorithm, which leads to much difficulty for the accurate identification of reconstructed acoustic fields. After detailed deduction of the beamforming algorithm, the relation between the shape parameters of microphone array and the ghost images-existing and the method of eliminating ghost images were attained in the reconstruction of acoustic fields. After the elimination of ghost images, the reconstruction precision would be improved if the value of D/λwas increased by means of optimization design of the array shape. What’s more, some reconstruction of acoustic fields experiments of the pure sound and narrow-band noise were made, which verified the feasibility of the method.