Analyze the coherence of ambient noise in the bay of bengal ocean region

Abstract

Underwater ambient noise consist of many signals generated by both natural and man made sources. These signals are spread over a wide range of frequencies. Thus, analysis and classification of the various components of ambient noise is an essential step in the process of de-noising underwater acoustic signals. This place a major role in the improvement of signal to noise ratio, which is an important characteristic of marine instruments. This paper investigates the effect noise spectrum over a different wind speed and the signal coherence with sensor separation are examined for a number of line array processor in the pacific ocean region. To clarify the effect of sensor separation on the noise field, the relatively simple case of a semi infinite ocean with Isovelocity profile is considered.