Offshore Marine Ambient Noise Measurement Study Based on Laser Interferometer Hydrophone

Abstract:

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.

• Periodical: Advanced Materials Research (Volumes 945-949)
• Pages: 746-749
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.945-949.746
• Online since: June 2014
• Authors: Zhi Li Hua*, Lei Li, Zhong Hai Zhou
• Keywords: Hydrophone, Marine Acoustics, Marine Ambient Noise, Michelson Interferometry

References

[1] Liu Bosheng, Lei Jiayu, Water Acoustics, Harbin Engineering University Press, Harbin, (1993).

[2] H.M. Walkinshaw, Measurements of Ambient Noise Spectra in the South Norwegian Sea, IEEE Journal of Oceanic Engineering. 30(2005) 262-266.

DOI: 10.1109/joe.2004.836990

[3] R.A. Wagstaff, J.W. Aitkenhead, Amblent Noise Measurements in the Northwest Indian Ocean, IEEE Jomal of Oceanic Engineering. 30(2005) 295-302.

DOI: 10.1109/joe.2004.836994

[4] R.C. Wei, J.F. Lyneh, A.E. Newhall, The Ambient Noise Fluctuation and Directionality Study in South China Sea, J.A.S.A. (2004) 255-260.

[5] Wang Zefeng, Hu Yongming, Meng zhou, Frequency response of two-order acoustic low-pass filtering fiber-optic hydrophones, Acta Optica Sinica, 28(2008)1883-1887. (in Chinese).

DOI: 10.3788/aos20082810.1883

[6] Gu Hongcan, Yuan Bingcheng, Huang Junbin, Theoretical and experimental analysis of an active optic fiber hydrophone, Acta Optica Sinica , 28(2008) 2316-2320. (in Chinese).

DOI: 10.3788/aos20082812.2316

[7] Wang Zefeng, Hu Yongming, A noval passive homodyne fiber-optic hydrophone of acoustic low-pass filtering, Acta Optica Sinica, 28(2008) 783-786. (in Chinese).

DOI: 10.3788/aos20082804.0783

[8] Chen Benyong, Li Dacheng, Zhu Ruogu, Algorithm for automatic tracing of interference fringe and its application to nanometer measurement, Optical Technique, 27(2001) 223-226.

[9] L.D. Landau, E. M Lifshits et al. Theoretical physics, Vol. VII, Theory of elasticity, Moscow, 1987: 246.

[10] M.B. Porter, The KRAKEN Normal Program, DARPA. (1997).

[11] R.J. Urick, Ambient noise in the sea, Naval sea systems command department of the navy. (1984).