Reflection and refraction of plane acoustic waves at water-sediment interface

In this paper, the reflection and refraction of plane acoustic waves are studied for the case where the sediments are coarse sand, coarse silt and fine silt. The sediments are modeled based on the classical work of Biot who predicts three different kinds of attenuating waves but we only study the fast-wave. The prediction of reflection and refraction of plane acoustic waves at three different kinds of sediments shows that: the reflection loss of the coarse sand is the minimum, and the reflection loss of the fine silt is the maximum. The difference of the reflection loss among the three different sediments is larger than 4dB, and the fine silt changes sharply when the incident angle is 80° When the incident angle is within 50°, the refraction loss of the coarse sand is the maximum, and the refraction loss of the fine silt is the minimum. In general, there is an increasing trend of the reflection loss and refraction loss with the increase of frequency.