CAOHC CERTIFICATION STUDY GUIDE|ACTUAL EXAM QUESTIONS
AND WELL DETAILED VERIFIED SOLUTIONS| GRADED A+| BRAND
NEW 2026/2027 UPDATE
CAOHC's primary objective is to - ANSWER Educate, inform, and guide industry and those
serving industry on successful implementation of occupational HCP's to prevent occupa-
tional hearing loss
CAOHC recertification: - ANSWER Required every 5 years
The sector with the highest incidence of occupational hearing loss: - ANSWER Manufac-
turing
Auditory effects of noise exposure include noise induced hearing loss, hyperacusis and: - AN-
SWER tinnitus
Noise induced hearing loss typically occurs initially at: - ANSWER 4000 Hz
Early signs/symptoms of a noise induced hearing loss include tinnitus, difficulty understand-
ing in background noise and: - ANSWER Reliance on visual cues
Typical characteristics of a noise induced hearing loss include a notch at 4000 hz, variable
susceptibility among individuals: - ANSWER Bilateral and sensorineural
The 3 tiny bones in the middle ear collectivly form the: - ANSWER Ossicular chain
The bones of the middle ear (in order from ear drum to oval window are the: - ANSWER
Malleus, incus, stapes (MIS)
1
, The primary function of the outer ear is to: - ANSWER collect sound waves and channel
them down the ear canal
Type of hearing loss that results from cerumen impaction: - ANSWER conductive
Hearing loss due to aging: - ANSWER presbycusis
Part of ear damaged by hazardous noise exposure: - ANSWER Organ of the corti (cochlea)
Frequency is perceived as pitch, is measured in Hertz, and: - ANSWER Does not have a
bearing on risk of developing hearing loss.
Range of Human Frequency range at birth: - ANSWER 20-20,000 Hz
A decibal is the unit of measurement for: - ANSWER Intensity
According to the decibal doubling rule, adding together two identical noise sources of 100
dBA each will result in a total of: - ANSWER 103dBA
The range of intensity from audible to discomfort for human hearing is: - ANSWER 0dB-
140dB
The relationship between ___ and ___ is what determines the risk of noise induced hearing
loss: - ANSWER Duration and intensity
The __ weighting network resembles how the human ear responds to sound and required by
OSHA to be used in HCP's to determine risk: - ANSWER A
Steady-state or continuous noise has a duration of: - ANSWER 1 second or lonfer
2
AND WELL DETAILED VERIFIED SOLUTIONS| GRADED A+| BRAND
NEW 2026/2027 UPDATE
CAOHC's primary objective is to - ANSWER Educate, inform, and guide industry and those
serving industry on successful implementation of occupational HCP's to prevent occupa-
tional hearing loss
CAOHC recertification: - ANSWER Required every 5 years
The sector with the highest incidence of occupational hearing loss: - ANSWER Manufac-
turing
Auditory effects of noise exposure include noise induced hearing loss, hyperacusis and: - AN-
SWER tinnitus
Noise induced hearing loss typically occurs initially at: - ANSWER 4000 Hz
Early signs/symptoms of a noise induced hearing loss include tinnitus, difficulty understand-
ing in background noise and: - ANSWER Reliance on visual cues
Typical characteristics of a noise induced hearing loss include a notch at 4000 hz, variable
susceptibility among individuals: - ANSWER Bilateral and sensorineural
The 3 tiny bones in the middle ear collectivly form the: - ANSWER Ossicular chain
The bones of the middle ear (in order from ear drum to oval window are the: - ANSWER
Malleus, incus, stapes (MIS)
1
, The primary function of the outer ear is to: - ANSWER collect sound waves and channel
them down the ear canal
Type of hearing loss that results from cerumen impaction: - ANSWER conductive
Hearing loss due to aging: - ANSWER presbycusis
Part of ear damaged by hazardous noise exposure: - ANSWER Organ of the corti (cochlea)
Frequency is perceived as pitch, is measured in Hertz, and: - ANSWER Does not have a
bearing on risk of developing hearing loss.
Range of Human Frequency range at birth: - ANSWER 20-20,000 Hz
A decibal is the unit of measurement for: - ANSWER Intensity
According to the decibal doubling rule, adding together two identical noise sources of 100
dBA each will result in a total of: - ANSWER 103dBA
The range of intensity from audible to discomfort for human hearing is: - ANSWER 0dB-
140dB
The relationship between ___ and ___ is what determines the risk of noise induced hearing
loss: - ANSWER Duration and intensity
The __ weighting network resembles how the human ear responds to sound and required by
OSHA to be used in HCP's to determine risk: - ANSWER A
Steady-state or continuous noise has a duration of: - ANSWER 1 second or lonfer
2
