Download Ear ear

Ear Ear
Inside an Ear
Ear Camera
Causes of hearing loss
• Disease
– Some illnesses affect the ear and can cause hearing loss.
• Drugs
– Some medicines can damage the ears if they are used for a long
time.
• Trauma
– Foreign objects poked in the ear, sudden changes in air pressure
and very loud noises can all damage the ear.
• Age
– Higher frequencies are harder to hear after the age of 20.
People don’t usually notice until they are over 55.
• Noise
– Hearing loud noises (over 85dB) for a long time causes hearing
loss.
The Ear Drum (tympanic membrane)
Normal Eardrum
Burst (perforated) eardrum
Hairy Ears
Normal hairs
Rows of hair cells
Damaged hairs
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