| The research of near field acoustical holographic imaging method |
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| 引用本文： | ZHANG Dejun,XIA Xianhua,YAN Jing CHENG Jianzheng,WANG Qun,ZHU Nianqiu(Wuhan Institute of Physics,Chinese Academy of Sciences,Wuhan,430071). The research of near field acoustical holographic imaging method[J]. 声学学报：英文版, 1993, 0(1) |
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| 作者姓名： | ZHANG Dejun XIA Xianhua YAN Jing CHENG Jianzheng WANG Qun ZHU Nianqiu(Wuhan Institute of Physics Chinese Academy of Sciences Wuhan 430071) |
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| 作者单位： | Wuhan Institute of Physics，Chinese Academy of Sciences，Wuhan，430071 |
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| 基金项目： | The project is supported by National Natural Science Foundation of China |
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| 摘 要： | This paper reviews the theoretical analysis of the imaging method andcharacteristic of the Nearfield Acoustical Holography(NAH).We present anew filtering method,least squares method for filtering with restraint,whichimproves the stability of the reconstruction.The computer simulation experi-ment for the vibration and radiation of a round plate by means of the numericalmethod of NAH has been done and the effect of the new filtering method hasbeen verified.The NAH imaging of radiation of a small loudspeaker using ascanning linear receiving array of 32 elements has been made and the prelimina-ry results are given in the paper.
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The research of near field acoustical holographic imaging method |
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| ZHANG Dejun,XIA Xianhua,YAN Jing CHENG Jianzheng,WANG Qun,ZHU Nianqiu. The research of near field acoustical holographic imaging method[J]. Chinese Journal of Acoustics, 1993, 0(1) |
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| Authors: | ZHANG Dejun XIA Xianhua YAN Jing CHENG Jianzheng WANG Qun ZHU Nianqiu |
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| Abstract: | 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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| Keywords: | Acoustic holographic Filtering method Least square method. |
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