Be familiar with the path of sound as it
travels from the outer ear to the brain.
Acoustic energy gathered by the auricle (pinna) channeled into the external auditory meatus, strikes and vibrates the tympanic membrane, vibrates the 3 bones, across the oval window, travels into the scalia vestibuli. Hydraulic energy (perilymph) compresses Reissner's membrane, disturbs hair cells in Organ of Corti in scalia media. Electrical signal is sent on to the brain. Then sound that is not transmitted to the brain compresses basilar membrane, scalia tympani, middle ear