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Sea Surface effects on Sound Scattering in the Persian Gulf Region Based on Empirical Relations

Journal of Marine Science and Application 2015年第2期14卷 113-125页

作者： Parviz Ghadimi Alireza Bolghasi Mohammad A. Feizi Chekab Department of Marine Technology Amirkabir University of Technology Tehran 15875-4413 Iran

In this paper, sound scattering from the sea surface in the Persian Gulf region is investigated. Chapman-Harris and Ogden-Erskine empirical relations coupled with perturbation theory are implemented. Based on the Ogden and Erskine＇s experiments, sound scattering from the sea surface has three different regimes in which two mechanisms of surface roughness and subsurface bubble clouds are involved. Ogden-Erskine＇s scattering relation which consists of perturbation theory and Chapman-Harris＇s scattering terms are verified by the experimental data of Critical Sea Tests 7. Subsequently, wind speed in the Persian Gulf is provided based on three data bases of Arzanah station, ERA40, and PERGOS. Accordingly, surface scattering strength in the Persian Gulf region is calculated at different grazing angles, frequencies and provided wind speeds. Based on the resulted values of scattering strength, scattered intensity from the sea surface is also studied. These studies indicate that both scattering strength and scattered intensity generally increase as grazing angle, frequency and wind speed increase.

关键词： surface scattering strength scattered intensity seasurface effects Persian Gulf sound scattering empirical relation perturbation theory

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