CAOHC TEST Exam questions and Answers (Latest Update 2025) Upcoming Exam
- Basics of Hearing and Hearing Loss
1.Question: What is the primary cause of noise-induced
hearing loss (NIHL)?
oOptions:
a) Age b) Prolonged exposure to loud noise c) Genetic predisposition d) Ear infections
oAnswer: b) Prolonged exposure to loud noise
oRationale:
Noise-induced hearing loss occurs due to prolonged exposure to harmful sound levels, typically above 85 decibels (dB), which damage the hair cells in the inner ear.
2.Question: At what decibel level does noise start to
become hazardous to hearing with prolonged exposure?
oOptions:
a) 50 dB b) 75 dB c) 85 dB d) 100 dB
oAnswer: c) 85 dB
oRationale:
Noise levels above 85 dB are considered hazardous 1 / 3
CAOHC TEST Exam questions and Answers (Latest Update 2025) Upcoming Exam to hearing when individuals are exposed to them for extended periods. Hearing protection is recommended above this threshold.
3.Question: What part of the ear is most commonly
damaged by loud noises?
oOptions:
a) Eardrum b) Cochlea c) Ear canal d) Auditory nerve
oAnswer: b) Cochlea
oRationale:
The cochlea is responsible for converting sound vibrations into electrical signals for the brain. Loud noises can damage the hair cells in the cochlea, leading to permanent hearing loss.
4.Question: Which frequency range is most affected by
noise-induced hearing loss?
oOptions:
a) 500 Hz - 1000 Hz b) 1000 Hz - 2000 Hz c) 2000 Hz - 4000 Hz d) 4000 Hz - 8000 Hz
oAnswer: c) 2000 Hz - 4000 Hz 2 / 3
CAOHC TEST Exam questions and Answers (Latest Update 2025) Upcoming Exam
oRationale:
Noise-induced hearing loss typically affects the 2000 Hz - 4000 Hz frequency range, which is critical for understanding speech and high-frequency sounds.
5.Question: Which of the following is a preventive
measure against noise-induced hearing loss?
oOptions:
a) Wearing earplugs b) Taking regular breaks from noisy environments c) Lowering the volume of personal audio devices d) All of the above
oAnswer: d) All of the above
oRationale:
All of the listed options are important measures in preventing noise-induced hearing loss. Using earplugs, taking breaks, and controlling volume levels help reduce the risk.
- Hearing Conservation Programs
6.Question: What is the goal of an occupational hearing
conservation program?
oOptions:
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