The Effect of Water Surface and Sea Bottom on Sound Propagation in Persian GulfIranian Journal of Marine Science and Technology
Whether exploratory or commercially, acoustic fishery benefits are important in finding aschool of fish and other aquatics, but using this procedure and state accurate detailed information forthe whole specifications of organisms require sufficient information of sound speed changes, courseof ray propagation and their rate of absorption and attenuation.This research has considered the quality of sound speed changes towards the depth in terms ofphysical specifications of Dayer port's water situated in the northeast of Farsi island and around 50Km south of Delvar (latitude 28',2' north and longitude 50°,58' east), and also has calculated theamount of absorption in these regions.The results have shown that sound speed is constant with depth and temperature decreases within thefirst 11 meters, but after that it declines. In the 19– meter depth, there is a stronger decrease which isrelated to the decrease of temperature. It is because of colder current in this region. By investigatingsound absorption curves of the area, it is observed that the maximum amount of attenuation is withinthe depth of 17 to 27111
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