![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
Consider the ocean surface is a smooth plane between sea water (density 1000 kg/m3, sound speed 1500 m/s) and air (density 1.03 kg/m3, sound speed 330 m/s), assume underwater sound is normally incident to the interface , the pressure reflection and transmission coefficients are .