A frogs tympanic membrane, or tympanum, is the circular patch of skin directly behind its eye that we commonly call its eardrum. It functions much like our eardrum does - the tympanum transmits sound waves to the middle and inner ear, allowing a frog to hear both in the air and below water. <span />
It works just like a human tympannic membrane. They hear sounds through this structure as sound waves vibrate against the membrane. The men rane acts like a drum skin.
