More Structures. Tympanic membrane- where the middle ear begins Sound is amplified by concentrating the sound energy from the large tympanic membrane to the smaller oval window Eustachian Tube- permits the equalization of air pressure on either side of the eardrum
The inner ear is able to identify pitch and loudness. Close to the oval window the membrane is narrow and stiff. This area is activated by high-frequency sound waves. This leads to us hearing high pitched sounds.
When the head is in a normal position, the otoliths do not move. When the head is bent the otoliths will move causing the cilia on the hair cells to bend. This bending on the cilia activates the sensory nerve.