The primary focus of the work was to estimate propagation loss and provide a quantitative estimate in transmission loss using sound propagation modeling in shallow waters of south west Bay of Bengal and also to validate the results with field measurements. KRAKEN normal mode sound propagation for a range independent environment in the frequency range of 850-1050 Hz was used for the simulation. The water depth was taken as 20 m. Transmission loss is estimated at four different ranges for a source at 10 m depth by using the essential acoustic input parameters. To validate results obtained through modeling, an experiment was conducted to measure transmission loss directly in an environment that closely matched with the model. The results of transmission loss estimated using the model was compared with the field measurements at short ranges.

中文翻译：

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孟加拉西南湾浅水区声传播的观测与建模方法

这项工作的主要重点是在孟加拉西南部西南湾浅水区使用声传播模型估算传播损失并提供定量的传播损失估算，并通过现场测量验证结果。模拟使用了在850-1050 Hz频率范围内不受范围限制的环境的KRAKEN普通模式声音传播。水深取为20m。通过使用基本的声学输入参数，可以估算出10 m深度处源的四个不同范围的传输损耗。为了验证通过建模获得的结果，进行了一个实验，以在与模型紧密匹配的环境中直接测量传输损耗。使用该模型估算的传输损耗的结果与短距离的现场测量结果进行了比较。