基于等效源的近场声全息算法不受声源形状限制，具有较强的环境适应性，考虑到声场重构的精度，提出一种基于虚拟声源定位的改进算法，分别在声源频率与重构距离变化情况下比较改进前后算法的重构精度与重构效果，利用仿真分析与实验验证，证明了基于等效源的近场声全息算法在水下运用的可靠性，以及基于虚拟声源定位进行声场重构时在声源分辨与声场还原的优势。在实验结果中，声源频率变化时，改进后算法的误差在低频时降低1.97～5.44 dB；重构距离变化时，改进后算法的误差降低1.97～3.99 dB。
The near-field acoustic holography algorithm based on the equivalent source is not limited by the shape of the sound source, and has strong environmental adaptability.Considering the accuracy of sound field reconstruction, an improved algorithm based on virtual sound source localization is proposed, and the reconstruction accuracy and reconstruction effect of the algorithm before and after the improvement are compared when the frequency of the sound source and the reconstruction distance change. Simulation analysis and experimental verification prove the reliability of the near-field acoustic holography algorithm based on equivalent sources in underwater applications, and the advantages of sound source resolution and sound field restoration when sound field reconstruction based on virtual sound source localization: In the experimental results, when the sound source frequency changes, the error of the improved algorithm is reduced by 1.97 dB−5.44 dB at low frequencies; when the reconstruction distance changes, the error of the improved algorithm is reduced by 1.97 dB−3.99 dB.
2022,44(11): 164-168 收稿日期：2021-07-05
DOI：10.3404/j.issn.1672-7649.2022.11.034
分类号：TB52
基金项目：国家自然科学基金青年基金资助项目（11904346）；浙江省自然基金青年基金资助项目（LQ19A040004）；水声对抗技术国防重点实验室基金一般项目（61422140402）
作者简介：胡清扬(1997-)，男，硕士研究生，研究方向为水声计量测试
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