The research of near field acoustical holographic imaging method
The research of near field acoustical holographic imaging method出 版 物：《Chinese Journal of Acoustics》 (声学学报（英文版）)
年 卷 期：1993年第12卷第1期
页 面：38-46页
学科分类：07[理学] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0824[工学-船舶与海洋工程] 0702[理学-物理学]
基 金：The project is supported by National Natural Science Foundation of China
主 题：Acoustic holographic Filtering method Least square method.
摘 要：This paper reviews the theoretical analysis of the imaging method and characteristic of the Nearfield Acoustical Holography (NAH). We present a new filtering method, least squares method for filtering with restraint, which improves the stability of the reconstruction. The computer simulation experiment for the vibration and radiation of a round plate by means of the numerical method of NAH has been done and the effect of the new filtering method has been verified. The NAH imaging of radiation of a small loudspeaker using a scanning linear receiving array of 32 elements has been made and the preliminary results are given in the paper.
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