Patch nearfield acoustic holography based on the equivalent source method

查看全文 作　　者：BI [1]ChuanXing;CHEN [1]XinZhao;XU [1]Liang;CHEN [1]Jian

机构地区：[1]Institute of Sound and Vibration Research,Hefei University of Technology,Hefei 230009,China

出　　处：《Science China(Technological Sciences)》索引2008年第51卷第1期,共11页

基　　金：the National Natural Science Foundation of China (Grant Nos. 10504006 and 50675056) ;the Research Fund for the Doctoral Program of Higher Education (Grant No. 20060359003) 摘　　要：On the basis of nearfield acoustic holography (NAH) based on the equivalent source method (ESM), patch NAH based on the ESM is proposed. The method overcomes the shortcoming in the conventional NAH that the hologram surface should be larger than the source surface. It need not to discretize the whole source and its measurement need not to cover the whole source. The measurement may be performed over the region of interest, and the reconstruction can be done in the region directly. The method is flexible in applications, stable in computation, and very easy to implement. It has good potential applications in engineering. The nu- merical simulations show the invalidity of the conventional NAH based on the ESM and prove the validities of the proposed method for reconstructing a partial source and the regularization for reducing the error effect of the pressure measured on the hologram surface. 关键词：acoustic HOLOGRAPHY NEAR field EQUIVALENT source REGULARIZATION

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Patch nearfield acoustic holography based on the equivalent source method

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