Anatomy of Hearing


Anatomy: The ear is responsible for hearing and also for balance. Three components to the ear is outer ear, middle ear, and inner ear. They are responsible for hearing but the inner ear is responsible for balance. Resources
Electrical waves that are transmited to the temporal lobe of the brain through the auditory nerve are converted into sound waves.
Resources
"The pinna plays a minor role in hearing. Its twists and folds help amplify certain sound frequencies and help you determine where a sound is coming from. In addition, the pinna "collects" sound, which is why you sometimes see people put a hand over their ear to hear better. Cupping the ear with a hand helps reduce background noise by blocking, at least in part, sound that is not to the front or side of a person" Link


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Physiology of Hearing

Physiology: Neural stimuli is transformed by the gathering of acustic energy and is trandmitted to the brain for processing. The external ear consists of auricle (pinna). The external ear extends from the conchal cartilage to the auricle to the tympanic membrane. In an adult its 25mm long.
The middle ear is made up of the tympanic membrane. The tympanic membrane forms a wall in the middle ear. It is an oval shape and 8mm wide and 10 mm high. The umbro marks the middle of the tympanic membrane and corresponds to the attachment of the tip of the malleus to the tympanic membrane.
The inner ear is made up of two main parts the cochlea (end organ for hearing) and the vestibule and semicircular canals (end organ for balance). Resources

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