The scales each respond to specific frequencies of sound waves and when a bat's echolocation signals hits the moth's wings, the scales start to vibrate.

每片鳞片都会对特定频率的声波做出反应，当蝙蝠的回声定位信号击中飞蛾的翅膀时，鳞片开始振动。

Different frequencies of sound waves are better at traveling through certain materials, just as we talked about with light waves.

不同频率的声波更适合穿过某些材料，就像我们谈论光波一样。