CAOHC EXAM STUDY EXPECTED QUESTIONS WITH
VERIFIED ANSWERS
Question 1.
Hearing protection derating
ANSWER
OSHA recommends to reduce NRR in half
Question 2.
Elements of a Hearing Conservation Program
ANSWER
Mandatory and includes: exposure monitoring, audiometric testing, hearing protection,
employee training, record keeping, and program evaluation
Question 3.
Unit of measurement for frequency (pitch)
ANSWER
Hertz (Hz)
Question 4.
Temporary Threshold Shift (TTS)
ANSWER
Brief exposure to intense noise that will ordinarily recover with auditory rest
Question 5.
Sensorineural hearing loss
ANSWER
Hearing loss resulting from damage to the inner ear (cochlea) or the auditory nerve
, Question 6.
This weighting scale is best for determining hearing protection attenuation
ANSWER
C weighted scale; has a flat response with all frequencies equally weighted
Question 7.
Risk of damage from noise
ANSWER
How loud (intensity) and how long (duration)
Question 8.
Impulse or Impact noise, e.g. gunfire or nail gun
ANSWER
Lasts less than one second
Question 9.
Pre-formed earplugs:
ANSWER
Can be washed with mild soap and water and reusable
Question 10.
Function of the Middle Ear
ANSWER
Amplification of sound; lever action of the ossicular chain and the mismatch in size of eardrum
and oval window amplify sound about 10 times
Question 11.
Eustachian tube (auditory tube)
ANSWER
Tube connecting the middle ear to the pharynx and equalizes middle ear space with
atmospheric pressure
VERIFIED ANSWERS
Question 1.
Hearing protection derating
ANSWER
OSHA recommends to reduce NRR in half
Question 2.
Elements of a Hearing Conservation Program
ANSWER
Mandatory and includes: exposure monitoring, audiometric testing, hearing protection,
employee training, record keeping, and program evaluation
Question 3.
Unit of measurement for frequency (pitch)
ANSWER
Hertz (Hz)
Question 4.
Temporary Threshold Shift (TTS)
ANSWER
Brief exposure to intense noise that will ordinarily recover with auditory rest
Question 5.
Sensorineural hearing loss
ANSWER
Hearing loss resulting from damage to the inner ear (cochlea) or the auditory nerve
, Question 6.
This weighting scale is best for determining hearing protection attenuation
ANSWER
C weighted scale; has a flat response with all frequencies equally weighted
Question 7.
Risk of damage from noise
ANSWER
How loud (intensity) and how long (duration)
Question 8.
Impulse or Impact noise, e.g. gunfire or nail gun
ANSWER
Lasts less than one second
Question 9.
Pre-formed earplugs:
ANSWER
Can be washed with mild soap and water and reusable
Question 10.
Function of the Middle Ear
ANSWER
Amplification of sound; lever action of the ossicular chain and the mismatch in size of eardrum
and oval window amplify sound about 10 times
Question 11.
Eustachian tube (auditory tube)
ANSWER
Tube connecting the middle ear to the pharynx and equalizes middle ear space with
atmospheric pressure
