Abstract
Noise characteristics at shallow water is highly va riable due to wave guide nature of the shallow wate r environment, reflection of noise from the bottom su rface; due to biological activities and also due th e sound speed in shallow water vary substantially. Thus noi se field characterization is complex in shallow wat er. The ambient noise data was collected in the shallow water of Arabian Sea and the Bay of Bengal using t he hydrophone suspended from the measuring platform. In this study, the comparison between vertical coherence of wind generated ambient noise in the sh allow water of Arabian Sea and Bay of Bengal region is done. The noise spectra for both the region are als o estimated. The relation between wind speed and no ise at constant frequency is also found out.
Highlights
The ambient noise data was collected in the shallow water of Arabian Sea and the Bay of Bengal using the hydrophone suspended from the measuring platform
In this proposed method compression of noise spectrum and coherence level were made between Arabian and Bay of Bengal ocean region
This analysis resulted that for the same wind speed at two different ocean region there is an variation in the noise spectrum level and coherence level
Summary
Ambient Noise detection of background noise is essential to enhance the signal to noise ratio of acoustic based underwater instruments. Surface generated noise is the prevailing noise of the ocean and its importance was identified in the earliest studies of ambient noise. Ambient noise is the prevailing, unwanted background of sound at a particular location in the ocean at a given time. It does not include transient sounds such as the noise of nearby ships and helps us to determine the characteristics of sound and the physical features of the ocean
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