In the process of hearing, vibrations travel from the air-filled middle ear, through a chain of small bones, and must be transferred into the fluid-filled inner ear. What is the critical role of the membrane-covered opening where the last bone connects to this fluid-filled structure?

Sound energy is transmitted from the air-filled middle ear to the fluid-filled inner ear. A series of small bones conveys vibrations to a small, membrane-covered opening leading to the inner ear. What is the primary functional challenge this opening and its membrane must overcome, and how does it accomplish this?

Cochlea