基于激光测振技术的低频水声换能器辐射声源级测量

doi:10.3969/j.issn.1000-1158.2025.02.12

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Abstract Aiming at the problems that the measurement of the radiation source level of low-frequency underwater acoustic transducers relies on large-scale free-field water areas and has high implementation costs， a source level measurement method based on scanning laser vibrometry is proposed. The principle of vibration velocity measurement using heterodyne interferometry and the far-field sound pressure calculation method based on the Rayleigh integral are elaborated. A scanning measurement device for the surface vibration velocity of the transducer is set up and and complex vibration modes on the transducer surface are observed in the experiments. The far-field sound pressure is deduced from the surface vibration and compared with results in the free-field lake test. The differences in the measured source levels at frequencies of 100 Hz and 5 kHz are -2.2 dB and 0.9 dB respectively， and the results are basically consistent， verifying the effectiveness of this method.

Key words： acoustic metrology low-frequency hydroacoustic transducer source level measurement laser vibrometry far-field sound pressure

Received: 28 February 2024 Published: 04 March 2025

PACS:

TB95

Fund:National Key Research and Development Program of China;National Natural Science Foundation of China;Basal Research Fund for the Central Scientific Institutions;Basal Research Fund for the Central Scientific Institutions

Corresponding Authors: Min WANG E-mail: wangmin@nim.ac.cn

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	WANG Wenxia
	QIANG Chenghu
	WANG Min
	YANG Ping
	AI Hua
	WANG Ke
	HE Longbiao

Cite this article:

WANG Wenxia,QIANG Chenghu,WANG Min, et al. Measurement of Source Level of Low-frequency Hydroacoustic Transducers Based on Laser Vibrometry[J]. Acta Metrologica Sinica, 2025, 46(2): 240-246.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2025.02.12 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2025/V46/I2/240

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