CAOHC EXAM REVIEWED
QUESTIONS AND CORRECT ANSWERS
Elements to an effective hearing program?
hearing protection, record keeping, training, noise
monitoring and control
In addition to noise, ____ exposure can be caused by
sensorineral hearing loss?
Ototoxicant
Intensity is measured in ____
decibels (dB)
Frequency is measured in ___
Hz (Hertz)
Functions of the outer ear
collects sound waves and enhances high frequency
sounds
Functions of the middle
transforms sound to mechanical energy
The three bones in the ear that help with hearing are
the ___, _____, and the ___
Incus, Malleus, and Stapes
Human hearing range at birth
20-20000 Hz
What causes sensorineural hearing loss?
When hearing is only available in one ear and not the
other is called ____ hearing loss
Unilateral
Type S (limited function) offers
lower accuracy with limited function
, What is impulse/impact noise?
What part of the ear is shaped like a snail?
The cochlea
OSHA defines 100% noise dose as
90dB(A)
IF the retest does not confirm the STS, ____ are no
longer mandatory if TWA is 85-89dB(A)
hearing protective devices
What is intermittent noise?
What is Continuous noise?
Adding a muffler to an engine is an example of _____
control
engineering
Sound level meters and dosimeters should be
calibrated
yearly
What part of the ear does hearing loss affect?
Inner ear (cochlea)
____ is caused by auditory nerve damage
Tinnitus
What is mixed hearing loss?
combo of conductive and sensorineural
What part of the ear is affected by noise-induced
hearing loss?
outer or middle ear
The Noise Reduction Rating is calculated using the
___ weighted scale?
B
_____ and ____ are the two structures of the inner ear
hearing and balance
QUESTIONS AND CORRECT ANSWERS
Elements to an effective hearing program?
hearing protection, record keeping, training, noise
monitoring and control
In addition to noise, ____ exposure can be caused by
sensorineral hearing loss?
Ototoxicant
Intensity is measured in ____
decibels (dB)
Frequency is measured in ___
Hz (Hertz)
Functions of the outer ear
collects sound waves and enhances high frequency
sounds
Functions of the middle
transforms sound to mechanical energy
The three bones in the ear that help with hearing are
the ___, _____, and the ___
Incus, Malleus, and Stapes
Human hearing range at birth
20-20000 Hz
What causes sensorineural hearing loss?
When hearing is only available in one ear and not the
other is called ____ hearing loss
Unilateral
Type S (limited function) offers
lower accuracy with limited function
, What is impulse/impact noise?
What part of the ear is shaped like a snail?
The cochlea
OSHA defines 100% noise dose as
90dB(A)
IF the retest does not confirm the STS, ____ are no
longer mandatory if TWA is 85-89dB(A)
hearing protective devices
What is intermittent noise?
What is Continuous noise?
Adding a muffler to an engine is an example of _____
control
engineering
Sound level meters and dosimeters should be
calibrated
yearly
What part of the ear does hearing loss affect?
Inner ear (cochlea)
____ is caused by auditory nerve damage
Tinnitus
What is mixed hearing loss?
combo of conductive and sensorineural
What part of the ear is affected by noise-induced
hearing loss?
outer or middle ear
The Noise Reduction Rating is calculated using the
___ weighted scale?
B
_____ and ____ are the two structures of the inner ear
hearing and balance
