Acoustical properties of the sea bottom can be described using geoacoustic (GA) models. Most existing propagation models use GA parameters as the bottom properties. It is difficult to obtain GA parameters for a layered bottom because of inter parameter coupling. These problems can be solved by inverting the model-independent reflective parameters P and Q. For a multilayered bottom, a sound field computation model, RamPQ, is developed using the mapping of GA and (P, Q) spaces. The mean square error of the transmission loss in numerical simulations and experimental data for low-frequency sound propagation are employed to validate RamPQ and demonstrate the performance of the model.

中文翻译：

---

基于抛物线方程的底部反射参数 (P,Q) 声场建模

海底的声学特性可以使用地声学 (GA) 模型来描述。大多数现有的传播模型使用 GA 参数作为底部属性。由于参数间耦合，很难获得分层底部的 GA 参数。这些问题可以通过反转与模型无关的反射参数 P 和 Q 来解决。对于多层底部，使用 GA 和 (P, Q) 空间的映射开发了声场计算模型 RamPQ。采用数值模拟中传输损耗的均方误差和低频声音传播的实验数据来验证 RamPQ 并展示模型的性能。