基于近场声全息的重建算法分析与研究

doi:10.3969/j.issn.1000-1158.2021.10.12

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Abstract The wide variety of acoustic holography algorithms and the requirements of different applications, the three algorithms based on Fourier transform, statistically optimized and equivalent source model are analyzed by combining finite element simulation and numerical simulation. The influence of source frequency, reconstruction distance, sampling distance and regularization methods on reconstruction accuracy are found, and their computational efficiency is compared. Experiments are carried out in open water. The results show that: with the sound source frequency and the reconstruction distance increases, the number of sampling points decreases, the reconstruction accuracy decreases gradually. In the low frequency region, the statistical optimal near-field acoustic holography combined with L-curve regularization method has the best sound field reconstruction effect; the acoustic holography reconstruction based on equivalent source method has the highest accuracy, but it is easy to produce virtual images; the acoustic holography algorithm based on Fourier transform is seriously affected by the reconstruction distance, but the reconstruction speed is excellent, and the sound source positioning is accurate.

Key words： metrology near-field acoustic holography fourier transform statistical optimization equivalent source

Received: 16 July 2020 Published: 18 October 2021

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TB95

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	Articles by authors
	CHEN Lu
	GUO Shi-xu
	WANG Yue-bing
	ZHENG Hui-feng
	XU Ao-xuan

Cite this article:

CHEN Lu,GUO Shi-xu,WANG Yue-bing, et al. Analysis and Research of Reconstruction Algorithm Based on Near-field Acoustic Holography[J]. Acta Metrologica Sinica, 2021, 42(10): 1335-1342.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.10.12 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I10/1335

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