声波在运动层状介质中的反射和折射

利用界面相速度相等的条件推导出运动层状介质中声波反射系数和折射系数的递推计算公式 ,并对 2层和 5层的情况进行了计算。当声波入射到运动介质形成的单一界面时 ,除了常见的全反射和全透射外 ,由于介质的运动 ,还存在反射系数大于 1的情况。介质运动使声波穿过界面时出现声影区。声波入射到多层大气中能形成连续折射 ,而反射可以忽略。

Reflection and transmission of sound wave in discretely moving and layered media

The formulas for calculating the reflection and transmission coefficients of sound wave were deduced under the condition of equal sound phase velocities in moving media aside an interface. The reflection coefficients for a two layered and a five layered media were calculated with the formulas. Besides the total reflection and total transmission generated commonly in sound traveling through an interface, there is still an especial case that the reflection coefficient value may be over one as for moving media. The movement of media makes a sound shadow, when the sound wave is incident upon an interface. When the sound wave transmits to the layered air, the continuous transmission of sound wave can be caused, and the reflection of the sound wave can be omitted.