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Sound travels through the ear canal to the eardrum
setting it into vibration. These vibrations are transferred to three
very small bones (hammer, anvil and stirrup) in the middle ear.
When the stirrup vibrates, it causes movement of the fluid in the
inner ear which stimulates the sensory cells for hearing. Stimulation
of these sensory cells generates an electrical signal which travels
to the brain via the auditory nerve. This is how the ear functions.
Hearing
loss
Most hearing problems are caused by damage to the inner
ear. This type of hearing problem is commonly called a
sensorineural hearing loss or 'nerve deafness.'
There are many causes of nerve deafness; however, the most common
causes are exposure to loud noise and the aging process. When
the inner ear or auditory nerve is damaged, a weak, distorted,
and incomplete message is sent to the brain and understanding
becomes difficult if not impossible. Nerve deafness is not medically
curable, but if it is accompanied by ringing in the ears, dizziness
or drainage from the ear, it is important to see a medical doctor
at once.
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