声波从海底沉积层上的反射

Reflection of Acoustic Waves from a SeaBottom Sedimentary Layer

假设海底为一液态层复盖一孔隙弹性固体半空间，用声阻抗的概念，导出了其上的声反射系数的唯象公式。再将松散的沙（泥）质沉积物中的声阻抗的表式用于液态层，建立了反射系数与沙（泥）质沉积物的具体参数的联系。文末对高声频情况下的海底上的声反射系数进行了简化。并对几个特例作了数值计算。

Assume that the sea bottom is a liquid layer over a porous elastic solid halfspace, using the concept of wave impedance, the phenomenological formula of the reflection coefficient at the liquid layer surface is derived. After the expression of the wave impedance in loose sandy (muddy) sediment is applied to the liquid layer, the connection of the derived reflection coefficient with various parameters in sandy (muddy) sediment is established. In the case of high frequencies, the sound reflection coefficient at sedimentary layer surface is simplified. Finally, some numerical examples are given.