CAOHC study guide UPDATED ACTUAL Questions and CORRECT Answers
Educate, inform, and guide industry and those serving
CAOHC's primary objective is to industry on successful implementation of occupational
HCP's to prevent occupational hearing loss
CAOHC recertification: Required every 5 years
The sector with the highest incidence of occupational
Manufacturing
hearing loss:
Auditory effects of noise exposure include noise induced
tinnitus
hearing loss, hyperacusis and:
Noise induced hearing loss typically occurs initially at: 4000 Hz
Early signs/symptoms of a noise induced hearing loss
include tinnitus, diflculty understanding in background Reliance on visual cues
noise and:
Typical characteristics of a noise induced hearing loss
include a notch at 4000 hz, variable susceptibility among Bilateral and sensorineural
individuals:
The 3 tiny bones in the middle ear collectivly form the: Ossicular chain
The bones of the middle ear (in order from ear drum to
Malleus, incus, stapes (MIS)
oval window are the:
The primary function of the outer ear is to: collect sound waves and channel them down the ear canal
Type of hearing loss that results from cerumen impaction: conductive
Hearing loss due to aging: presbycusis
Part of ear damaged by hazardous noise exposure: Organ of the corti (cochlea)
Does not have a bearing on risk of developing hearing
Frequency is perceived as pitch, is measured in Hertz, and:
loss.
Range of Human Frequency range at birth: 20-20,000 Hz
A decibal is the unit of measurement for: Intensity
, According to the decibal doubling rule, adding together
two identical noise sources of 100 dBA each will result in 103dBA
a total of:
The range of intensity from audible to discomfort for hu-
0dB-140dB
man hearing is:
The relationship between and is what determines
Duration and intensity
the risk of noise induced hearing loss:
The weighting network resembles how the human ear
responds to sound and required by OSHA to be used in A
HCP's to determine risk:
Steady-state or continuous noise has a duration of: 1 second or lonfer
Time weighted average is based on: 8 hours
Per OSHA, the Action Level is dBA TWA and the
85; 90.
Permissible Exposure Limit is dBA TWA.
At the Action Level the requirements for enrolled employ-
hearing protection must be worn by those who have in-
ees are annual hearing testing and education, hearing
curred an STS
protection made available:
The is team member most likely to conduct noise
Industrial hygienist
measurements
Instrument that captures noise levels at a point in time Sound level meter
When employees are mobile and/or have exposures over
a workday, the recommended instrument for noise mea- Dosimeter
surement is:
A subjective rule for determining if your environment is
3-foot rule
potentially noise hazardous is the:
OSHA recommends a type microphone for noise
2
measurement instruments:
2/8
Educate, inform, and guide industry and those serving
CAOHC's primary objective is to industry on successful implementation of occupational
HCP's to prevent occupational hearing loss
CAOHC recertification: Required every 5 years
The sector with the highest incidence of occupational
Manufacturing
hearing loss:
Auditory effects of noise exposure include noise induced
tinnitus
hearing loss, hyperacusis and:
Noise induced hearing loss typically occurs initially at: 4000 Hz
Early signs/symptoms of a noise induced hearing loss
include tinnitus, diflculty understanding in background Reliance on visual cues
noise and:
Typical characteristics of a noise induced hearing loss
include a notch at 4000 hz, variable susceptibility among Bilateral and sensorineural
individuals:
The 3 tiny bones in the middle ear collectivly form the: Ossicular chain
The bones of the middle ear (in order from ear drum to
Malleus, incus, stapes (MIS)
oval window are the:
The primary function of the outer ear is to: collect sound waves and channel them down the ear canal
Type of hearing loss that results from cerumen impaction: conductive
Hearing loss due to aging: presbycusis
Part of ear damaged by hazardous noise exposure: Organ of the corti (cochlea)
Does not have a bearing on risk of developing hearing
Frequency is perceived as pitch, is measured in Hertz, and:
loss.
Range of Human Frequency range at birth: 20-20,000 Hz
A decibal is the unit of measurement for: Intensity
, According to the decibal doubling rule, adding together
two identical noise sources of 100 dBA each will result in 103dBA
a total of:
The range of intensity from audible to discomfort for hu-
0dB-140dB
man hearing is:
The relationship between and is what determines
Duration and intensity
the risk of noise induced hearing loss:
The weighting network resembles how the human ear
responds to sound and required by OSHA to be used in A
HCP's to determine risk:
Steady-state or continuous noise has a duration of: 1 second or lonfer
Time weighted average is based on: 8 hours
Per OSHA, the Action Level is dBA TWA and the
85; 90.
Permissible Exposure Limit is dBA TWA.
At the Action Level the requirements for enrolled employ-
hearing protection must be worn by those who have in-
ees are annual hearing testing and education, hearing
curred an STS
protection made available:
The is team member most likely to conduct noise
Industrial hygienist
measurements
Instrument that captures noise levels at a point in time Sound level meter
When employees are mobile and/or have exposures over
a workday, the recommended instrument for noise mea- Dosimeter
surement is:
A subjective rule for determining if your environment is
3-foot rule
potentially noise hazardous is the:
OSHA recommends a type microphone for noise
2
measurement instruments:
2/8
