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Hearing Conservation: You Decide What To Hear – SS1020BE (12 Min.)

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1

Noise-induced hearing loss can be completely cured through medical intervention or surgery.

True
False

2

The middle ear contains the three smallest bones in the human body: the hammer, anvil, and stirrup.

True
False

3

Most experts agree that continuous exposure to noise levels of 85 decibels or more may cause hearing loss.

True
False

4

Noise-induced hearing loss develops suddenly and causes immediate pain in the ears.

True
False

5

What is sound?

Light waves moving through the air
A series of vibrations or invisible waves in the air causing pressure changes
Electrical impulses traveling through the body
Air currents created by motion

6

Which part of the ear sends nerve signals to the brain that are recognized as sound?

Ear drum
Cochlea
Stirrup
Ear canal

7

Which of the following is the approximate decibel level of normal conversation?

30 dB
60 dB
100 dB
140 dB

8

Which of the following is NOT a form of personal hearing protection?

Ear plugs
Ear muffs
Canal caps
Safety glasses

9

When should you wear hearing protection at work?

Only when your supervisor tells you to
When you have to raise your voice to talk to someone an arm’s length away
Only when working with explosives
Only if your ears start ringing

10

Which of the following decibel levels is approximately a jet engine taking off?

60 dB
90 dB
120 dB
140 dB