在声学里，当声音遇到大的表面如墙时，就要采用一些特殊规则。

In acoustics, special rules apply when sound encounters large surfaces such as walls.

youdao

在声学里，当声音遇到大的表面如墙时，就要采用一些特殊规则。

In acoustics, special rules apply when sound encounters large surfaces such as walls.

youdao