CAOHC Practice Exam
What type of tone is employed in audiometry?
A. Complex
B. Pure
C. Basal
D. Harmonic
E. None of the above - ANS-B. Pure
What factors should be considered when selecting hearing protectors
A. Comfort
B. Ease of use
C. Attenuation amount
D. Communication requirements
E. All of the above - ANS-E. All of the above
When determining a threshold, a positive response should be followed by lowering the hearing
level 5 dB.
A. True
B. False - ANS-B. False
The method for approximating real world attenuation from an NRR is called "delisting".
A. True
B. False - ANS-B. False
What factors influence the effectiveness of hearing protectors?
A. Temperature
B. Radio frequencies
C. Particles
D. Solvents
E. All of the above - ANS-E. All of the above
Which of the following is a method to verify proper plug insertion?
A. Acoustic check observing noise level change when cupping hands over ear
B. Observing attenuation when tapping gently on the mastoid bone
C. Check the packaging NRR and verify is adequate for sound levels encountered
, D. All of the above
E. None of the above - ANS-A. Acoustic check observing noise level change when cupping
hands over ear
The commonly considered range of normal hearing is from:
A. 0-25 dB
B. 0-35 dB
C. 0-45 dB
D. 25-35 dB
E. 25-45 dB - ANS-A. 0-25 dB
What is the term for temporary hearing loss after noise exposure?
A. Temporary Threshold Shift
B. Transient Inurement
C. Ossicle Dampening Phenomenon
D. Noise-Induced Hearing Lesion
E. Standard Threshold Shift - ANS-A. Temporary Threshold Shift
'Hearing levels' used by audiometers are also known as 'sound pressure levels'.
A. True
B. False - ANS-B. False
Intermittent noise is noise that:
A. Does not end
B. Fluctuates in sound levels with periodic interruptions of relative quiet
C. Rises continuously
D. Has been abated through the implementation of engineering controls
E. None of the above - ANS-B. Fluctuates in sound levels with periodic interruptions of relative
quiet
When performing a test, it is best practice to:
A. Vary the interval between tone presentations
B. Present constant tones for at least 3 seconds
C. Use an interval that is less than the length of the tone presentation
D. All of the above
E. None of the above - ANS-A. Vary the interval between tone presentations
OHCs using a microprocessor audiometer never need to understand how to calculate an STS.
What type of tone is employed in audiometry?
A. Complex
B. Pure
C. Basal
D. Harmonic
E. None of the above - ANS-B. Pure
What factors should be considered when selecting hearing protectors
A. Comfort
B. Ease of use
C. Attenuation amount
D. Communication requirements
E. All of the above - ANS-E. All of the above
When determining a threshold, a positive response should be followed by lowering the hearing
level 5 dB.
A. True
B. False - ANS-B. False
The method for approximating real world attenuation from an NRR is called "delisting".
A. True
B. False - ANS-B. False
What factors influence the effectiveness of hearing protectors?
A. Temperature
B. Radio frequencies
C. Particles
D. Solvents
E. All of the above - ANS-E. All of the above
Which of the following is a method to verify proper plug insertion?
A. Acoustic check observing noise level change when cupping hands over ear
B. Observing attenuation when tapping gently on the mastoid bone
C. Check the packaging NRR and verify is adequate for sound levels encountered
, D. All of the above
E. None of the above - ANS-A. Acoustic check observing noise level change when cupping
hands over ear
The commonly considered range of normal hearing is from:
A. 0-25 dB
B. 0-35 dB
C. 0-45 dB
D. 25-35 dB
E. 25-45 dB - ANS-A. 0-25 dB
What is the term for temporary hearing loss after noise exposure?
A. Temporary Threshold Shift
B. Transient Inurement
C. Ossicle Dampening Phenomenon
D. Noise-Induced Hearing Lesion
E. Standard Threshold Shift - ANS-A. Temporary Threshold Shift
'Hearing levels' used by audiometers are also known as 'sound pressure levels'.
A. True
B. False - ANS-B. False
Intermittent noise is noise that:
A. Does not end
B. Fluctuates in sound levels with periodic interruptions of relative quiet
C. Rises continuously
D. Has been abated through the implementation of engineering controls
E. None of the above - ANS-B. Fluctuates in sound levels with periodic interruptions of relative
quiet
When performing a test, it is best practice to:
A. Vary the interval between tone presentations
B. Present constant tones for at least 3 seconds
C. Use an interval that is less than the length of the tone presentation
D. All of the above
E. None of the above - ANS-A. Vary the interval between tone presentations
OHCs using a microprocessor audiometer never need to understand how to calculate an STS.
