Noise Induced Hearing Loss Flashcards

1
Q

Exposure to loud noise will cause damage to what part of the ear?

A

Inner ear

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2
Q

How does it occur?

A

Can be a one off exposure to intense sound e.g explosion = acoustic trauma

Or more commonly - continual exposure to loud sounds that cause hearing loss over time e.g occupational exposure

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3
Q

Acoustic trauma is caused by sounds over…

A

180 dB

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4
Q

What damage can acoustic trauma cause?

A

Rupture of tympanic membrane and ossicle fracture

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5
Q

What symptoms occur?

A

Bilateral symmetrical sensorineural hearing loss
Tinnitus
May be noise induced temporary threshold shift - when hearing improves away from source of exposure

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6
Q

What is seen on audiometry?

A

A notch at 3, 4 or 6 kHz with recovery at 8 kHz

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7
Q

How is it managed?

A

Reduce risk of occupational exposure - ear defenders

Hearing aids

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