Deafness

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2 types of deafness

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conduction deafness and nerve deafness

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Conduction Deafness

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Ossicles fuse together restricting their ability to magnify sounds

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2 types of deafness

conduction deafness and nerve deafness

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Conduction Deafness

Ossicles fuse together restricting their ability to magnify sounds

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Conduction Deafness is caused by

  • congenital defect when pregnant woman contract Rubella during the first trimester

  • Repeated ear infections

  • Otosclerosis – normal bone is replaced by spongy bone

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Nerve deafness

  • Occurs when cilia on the receptors has worn away, can be due to aging and to exposure to loud noises over 80 decibels.

  • Very loud for short times or slightly loud for longer times can cause damage

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Cochlear implants

  • Directly stimulate the auditory nerve

  • Very costly and speech received sounds like a robot