The tympanic cavity focuses the pressure of sound waves so that they're strong enough to move the fluid in the inner ear.

鼓膜腔集中声波的压力，这样它们就足够强大，可以移动内耳中的液体。

Now, the middle ear, also called the tympanic cavity, is the relay station between the outer and inner ear. Its main job is to amplify those sound waves so that they're stronger when they enter the inner ear.

现在，中耳，也称为鼓室，是外耳和内耳之间的中继站。它的主要工作是放大这些声波，以便它们进入内耳时更强。