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Landweber iterative regularization for nearfield acoustic holography

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Chinese Science Bulletin

Abstract

On the basis of the distributed source boundary point method (DSBPM)-based nearfield acoustic holography (NAH), Landweber iterative regularization method is proposed to stabilize the NAH reconstruction process, control the influence of measurement errors on the reconstructed results and ensure the validity of the reconstructed results. And a new method, the auxiliary surface method, is proposed to determine the optimal iterative number for optimizing the regularization effect. Here, the optimal number is determined by minimizing the relative error between the calculated pressure on the auxiliary surface corresponding to each iterative number and the measured pressure. An experiment on a speaker is investigated to demonstrate the high sensitivity of the reconstructed results to measurement errors and to validate the chosen method of the optimal iterative number and the Landweber iterative regularization method for controlling the influence of measurement errors on the reconstructed results.

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Authors and Affiliations

  1. Institute of Sound and Vibration Research, Hefei University of Technology, Hefei, 230009, China

    Bi Chuanxing, Chen Xinzhao, Zhou Rong & Chen Jian

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  1. Bi Chuanxing
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  2. Chen Xinzhao
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  3. Zhou Rong
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  4. Chen Jian
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Correspondence to Bi Chuanxing.

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Bi, C., Chen, X., Zhou, R. et al. Landweber iterative regularization for nearfield acoustic holography. CHINESE SCI BULL 51, 1374–1380 (2006). https://doi.org/10.1007/s11434-006-1374-z

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  • DOI: https://doi.org/10.1007/s11434-006-1374-z

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