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The Indian Ocean Region (IOR) today is arguably the most strategically important sea area globally. Being the focal point of maritime trade and a Geo-political hot-spot, the IOR is the transit point of maximum number of military and merchant fleets. The high volume of maritime traffic also translates to high levels of low frequency anthropogenic noise that are primary cause of acoustic habitat degradation for the big whales. The frequent stranding of such species in the recent past is a testimony of high ambient noise in the region. The lack of awareness among the stakeholders and the policy makers on the impact of acoustic habitat degradation and sustainable growth in the maritime domain is a cause of serious concern. The quantitative and qualitative assessment of the acoustic habitat degradation is a major step in any conservation initiative. In this work, our aim is to perform mapping of low frequency ambient noise over a selected Indian Ocean Region. The complete region is divided into multiple grids of 4.5 km x 4.5 km each. D. Ross formula allows us to calculate the source spectra of the ship, taking length and speed of the ship as input parameters. Further transmission loss is computed for each ship and hence the total noise of each individual grid is established. Furthermore, the noise of each grid is propagated up to 100 km. The final noise captured inside each grid is mapped and displayed.
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