当声波进入人的耳朵时，耳膜振动，引起耳朵内部的一些小骨头振动，并向大脑发出神经脉冲，这些脉冲被听者作为声音听到了。

• When an acoustic wave enters the ear,the eardrum vibrates,causing the tiny bones of the inner ear to vibrate along with it,and sending nerve pulses to the brain. These pluses are perceived as sound by the listener.