Frogs do not have ears on the outside of their body's that direct sound inward to the ear drum as we see in humans and many other animals. however they do have an ear drum, an inner ear, a brain, and most frogs have a middle ear as well. They hear with these structures as well as with their lungs.A frogs hearing functions much like ours. The eardrum of the majority of frogs is a membrane surrounded by a cartilage ring. Sound waves vibrate this structure, which in turn wiggles a rod connected to the eardrum, this sloshes fluid in the inner ear, which waves hairs in hair cells. Then the hair cells contact nerve fibers, generating electrical pulses. Nerve fibers then carry these signals to the brain where these nerve signals are interpreted as sound.