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Ambient Noise Analysis in Shallow Water of Arabian Sea Based On Ocean Depth

V. Vijaya Baskar, V. Rajendran, A. Sivabalan


Ambient noise is the typical and persistent unwanted background of sound at a particular location in the ocean at a given time of a year. This may be due to a variety of natural and artificial sources including seismic activity, oceanic turbulence, wind, distant shipping and marine organisms [Etter, 1991,Chapter 6]. It is location and time specific. In this paper, variation of ambient noise with depth was studied.Datas were collected at shallow water of Arabian sea using sensitive hydrophones at various depth and time. Data were collected for the period of six months to a wind speed ranges between 0.5 m/s to 7 m/s and the analysis were performed for frequencies ranging from 500 Hz to 7 KHz. Here we considered wind as the noise source. Frequency versus noise spectral density graph was plotted for various ocean depth. Linear relationship between the sea noise spectrum levels and the wind speed were found for the entire frequency range .Then the graph was plotted for various depth. It is concluded that in shallow water there is no much more variation in the ambient noise with depth and time.


Ambient Noise, Depth, Shallow Water, Wind

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Urick RJ. Ambient noise in the sea. Peninsula Publishing; 1984

Cato DH. Ambient sea noise in waters near Australia. J Acoust Soc Am 1976;60(2):320–8

Knudsen VO, Alford RS, Emling JW. Underwater ambient noise. J Mar Res 1948;7:410–29.

Piggott CL. Ambient sea noise at low frequencies in shallow water of the Scotian shelf. J Acoust Soc Am 1964;36(11):2152–63.

Wenz GM. Acoustic ambient noise in the ocean: spectra and sources. J Acoust Soc Am 1962;34(12):1936–56.

Perrone AJ. Ambient noise spectrum as a function of water depth. J Acoust Soc Am 1970;48(1):362–70.

Walkinshaw HM. Measurements of Ambient noise spectra in South Norwegian Sea. IEEE J Ocean Eng 2005;30(2):262–6.

Hazen MG, Desharnais F. The Eastern Canada shallow water ambient noise experiment. Proc. IEEE Oceans 1997;1:471–6.

Welch PD. The use of fast Fourier transform for the estimation of power spectra: a method based on time averaging over short, modified periodograms. IEEE Trans Audio Electroacoust 1967;15: 70–3.

Chapman NR, Cornish JW. Wind dependence of deep ocean ambient noise at low frequencies. J Acoust Soc Am 1993;93(2): 782–9.

Jack A. Shooter, Thomas E. Demary, and August F. Wittenborn Depth dependence of noise resulting from ship traffic and wind IEEE journal of oceanic engineering, vol. 15, no. 4, october 1990.


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