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Measurement and modeling of sound propagation over continental slope in the South China Sea. 2020
State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, Chinaliujin@mail.ioa.ac.cn, pzh@mail.ioa.ac.cn, lzhl@mail.ioa.ac.cn, lwy@mail.ioa.ac.cn, yangxishan@mail.ioa.ac.cn.
Measurements along two ship tracks were obtained in an experiment to investigate the properties of acoustic propagation over the continental slope in the South China Sea. The measured data show a notable difference in transmission loss about 35 dB as sound crosses different geodesic paths. Numerical simulations indicate that the range and azimuth-dependent geological properties control the level of the transmission loss and lead to this large transmission loss fluctuation. In addition, the model also suggests some small-scale features of horizontal refraction effect caused by irregular topography, but they are not observed in the measured data.
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