CAOHC test Latest Update 2024-2025 Questions and 100% Verified Correct Answers Guaranteed A+ At First Attempt
0 dB HL does not mean what? - CORRECT ANSWER: It does not mean that there is no
sound at that level
0-25dB HL represents what? - CORRECT ANSWER: Normal hearing range
90 dB HL represents what? - CORRECT ANSWER: Typically the highest output level
on a pure tone air conduction screening audiometer
A laboratory value assigned to the individual porduct and not a reflection of what kind of
attenuation the worker will ultimately recieve is called? - CORRECT ANSWER: NRR
Acoustic calibrations must be done? - CORRECT ANSWER: Yearly
Acoustic transformer, impedance matching system, provides pressue equalization, and protects the inner ear is the function of what part of the ear? - CORRECT ANSWER: Middle ear
An early stage indication of noise induced hearing loss is identified typically at which
frequencies on an audiogram? - CORRECT ANSWER: 3-6 kHz
Background noise can affect what? - CORRECT ANSWER: Low frequencies 500 Hz
and below.
Collects sound waves, localizes sounds waves, protects middle ear components and provides resonate amplication is the function of what part of the ear? - CORRECT
ANSWER: Outer ear
Conductive disorders are typical to which site of lesion, in contrast to NIHL? -
CORRECT ANSWER: Outer and middle ear
Confirmation of an STS must take place within? - CORRECT ANSWER: 21 days
dB (A) is used for? - CORRECT ANSWER: OSHA, MSHA, FRA, DoD compliance in
hearing conservation.
Frequency is subjectively interpreted as? - CORRECT ANSWER: Pitch and the number of cycles per second
Functionaly and biological checks are part of what? - CORRECT ANSWER: Daily
calibration
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