Types of hearing loss
Conductive Hearing Loss
This is caused by damage to the outer or middle ear, resulting in sound waves being blocked from moving through the outer to the middle ear.
Causes can be middle ear infection, excessive wax, fluid in the middle ear, damage to the middle ear bones, a perforation or a foreign body in the ear.
Sensori-neural Hearing Loss
This is caused by damage to the inner ear.
The inner ear is unable to pick up the vibrations from the outer ear and is unable to send the vibrations to hair cells in the middle ear and then as electrical impulses to the brain.
This can be the result of aging, excessive noise, infection, certain drugs and also birth defects.
Mixed hearing loss
This is caused by damage to the outer, middle- and the inner ear.
Typically, sound waves are not conducted efficiently to the inner ear, and once they reach the inner ear the vibrations cannot be picked up or sent to the brain as electrical impulses.
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