Theoretical and Experimental Analysis of an Active Optic Fiber Hydrophone

Hongcan, 顾宏灿 Gu; Bingcheng, 苑秉成 Yuan; Junbin, 黄俊斌 Huang; Bo, 谭波 Tan; Rizhong, 李日忠 Li; Yu, 李玉 Li

doi:10.3788/aos20082812.2316

Cited by 1 publication

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“…As a scalar, sound pressure can be measured by hydrophone in changes of water pressure. Current common hydrophone mainly include scalar hydrophone [3,4] and vector hydrophone [5,6,7] . Based on the principle of Michelson laser interferometer, a scalar acoustic pressure hydrophone is developed.…”

Section: Introductionmentioning

confidence: 99%

Offshore Marine Ambient Noise Measurement Study Based on Laser Interferometer Hydrophone

Hua

Zhou

2014

AMR

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Sound pressure is an important parameter of marine background noise monitoring. A laser interferometric hydrophone is designed based on Michelson interferometry. By tracking compensation method, immunity from interference of the hydrophone is improved. Error analysis shows that the vibrating membrane is the main source of the sound pressure error, which can be eliminated to a certain extent by a vibrating membrane materials selection. Offshore data show that hydrophone pressure measurement of high precision, and with a good frequency response. By comparison with the theoretical model to some extent also verified the accuracy of data. In coastal waters, wind noise and ship radiate noise is the main noise source of marine ambient noise. Here, marine ambient noise spectrum of three wind speed were calculated, and with Kundsen curves were compared. Results show that measured data and Kundsen curve fitting is better. In addition, the measurement of vessel radiation noise is mainly concentrated in frequency range of 350~500Hz.

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