CAOHC Practice Exam Questions with

CAOHC Practice Exam Questions with Complete Solutions (Latest 2025) What type of tone is employed in audiometry?

• Complex
• Pure
• Basal
• Harmonic
• None of the above - Correct Answers ✅B. Pure

What factors should be considered when selecting hearing protectors

• Comfort
• Ease of use
• Attenuation amount
• Communication requirements
• All of the above - Correct Answers ✅E. All of the above

When determining a threshold, a positive response should be followed by lowering the hearing level 5 dB.

• True
• False - Correct Answers ✅B. False 1 / 3

CAOHC Practice Exam Questions with Complete Solutions (Latest 2025) The method for approximating real world attenuation from an NRR is called "delisting".

• True
• False - Correct Answers ✅B. False

What factors influence the effectiveness of hearing protectors?

• Temperature
• Radio frequencies
• Particles
• Solvents
• All of the above - Correct Answers ✅E. All of the above

Which of the following is a method to verify proper plug insertion?

• Acoustic check observing noise level change when cupping

hands over ear

• Observing attenuation when tapping gently on the mastoid

bone

• Check the packaging NRR and verify is adequate for sound

levels encountered 2 / 3

CAOHC Practice Exam Questions with Complete Solutions (Latest 2025)

• All of the above
• None of the above - Correct Answers ✅A. Acoustic check

observing noise level change when cupping hands over ear

The commonly considered range of normal hearing is from:

• 0-25 dB
• 0-35 dB
• 0-45 dB
• 25-35 dB
• 25-45 dB - Correct Answers ✅A. 0-25 dB

What is the term for temporary hearing loss after noise exposure?

• Temporary Threshold Shift
• Transient Inurement
• Ossicle Dampening Phenomenon
• Noise-Induced Hearing Lesion
• Standard Threshold Shift - Correct Answers ✅A.

Temporary Threshold Shift 'Hearing levels' used by audiometers are also known as 'sound pressure levels'.

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