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Reconstruction and prediction of multi-source acoustic field with the distributed source boundary point method based nearfield acoustic holography

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Abstract

In a multi-source acoustic field, the actual measured pressure is a scalar sum of pressures from all the sources. The pressure belonging to every source cannot be separated out with the existing techniques. Consequently, routine formulas cannot be used to reconstruct the acoustic source and predict the acoustic field directly. In this paper, a novel theoretical model of reconstruction and prediction of multi-source acoustic field in the distributed source boundary point method (DSBPM) based nearfield acoustic holography (NAH) is established. Three different methods, namely combination method with single surface measurement, combination method with multi-surface measurement and elimination method with multi-surface measurement, are proposed to realize the holographic reconstruction of sources. With these methods, the problem of reconstruction and prediction of acoustic field existing multiple coherent sources synchronously is solved effectively. Using the particular solutions constructed by the DSBPM to establish the vibro-acoustic transfer matrix, the calculation time, calculation precision and calculation stability are improved. These methods are valuable in localizing acoustic source and predicting acoustic field in engineering field.

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Authors and Affiliations

  1. Dynamic Measuring Center, Hefei University of Technology, 230009, Hefei, China

    Bi Chuanxing, Chen Jian & Chen Xinzhao

Authors
  1. Bi Chuanxing
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  2. Chen Jian
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  3. Chen Xinzhao
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Correspondence to Bi Chuanxing.

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Bi, C., Chen, J. & Chen, X. Reconstruction and prediction of multi-source acoustic field with the distributed source boundary point method based nearfield acoustic holography. Sci. China Ser. E-Technol. Sci. 47, 216–228 (2004). https://doi.org/10.1360/02ye0127

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  • DOI: https://doi.org/10.1360/02ye0127

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