层状介质中多次反射波的作用

在层状介质中,采用“隔离层”的办法,可以分离出一次反射波和多次反射波。通过研究层状介质系统中多次反射波的特点可以看到,多次反射有加强低频成分能量的作用,随着界面反射系数的增大,反射次数和层数的增多,这种加强低频作用就越加明显。

The effect of multiple reflection in layered medium

We can extract respectively primary reflection and multiple reflection by adopting"separate bed" method.After analysing the cha-racteristics of multiple reflections in layered medium, we can see that multiple reflection may enhance low frequency reflection and that the enhancement effect becomes more obvious with the increase of reflection coefficient,multiple order and bed number.