CAOHC SEP 2024 REVIEW Correct 100%
Unit of measurement for frequency (pitch) - ANSWER Hertz (Hz) or Kilohertz (kHz)
Time-Weighted Average changes if an employee works longer than _____ hour shifts. -
ANSWER 8 hour
Time-Weighted Average calculates ________________________ or dB____ and the
________________ of noise exposure. - ANSWER Amplitude ; dB(A) ; duration
According to OSHA, the ACTION LEVEL (AL) at which workers should be included in a
hearing conservation program occurs when they are exposed to a consistent sound
level of ___________ dB_____ for an entire ____-hour shift. - ANSWER 85dB(A) ; 8-
hour shift
According to OSHA, the permissible exposure limit (PEL) for 8 hours that should not be
exceeded is: - ANSWER 90 dB(A)
Several government agencies, including ______, _________, FRA, and individual state
and local governments, develop and publish noise related regulations requiring
compliance by employers. - ANSWER OSHA ; DoD
If more than one regulation applies to a workplace, be sure to follow the most
_______________ one. - ANSWER Stringent
Regardless of the 8-hour average, impact or impulse noise exposure should never
exceed ___________ dB(P) - ANSWER 140 dB(P)
If the 8-hour Time-Weighted Average is 90 dB(A) or above, the Permissible Exposure
Limit has been reached and additional requirements apply. These include:
1. The use of __________ __________ becomes mandatory.
2. Employers must consider feasible ________________ or ________________
controls to reduce noise exposure.
3. Employers must ensure hearing protection reduces sound levels reaching the ear to
below ________ db_____. - ANSWER 1. hearing protection
2. engineering or administrative
3. 90 dB(A)
Noise exposures are considered likely to be harmful if shouting is required in order to
communicate to a person __________ feet away. - ANSWER 3 feet
The primary role of CAOHC is to advocate for comprehensive programs that promote
_____________ ________________ in occupational hearing conservation. - ANSWER
Best Practices
, Which is true about the characteristics of sound called "frequency" (pitch, like piano
notes)? It is measured in _____________. - ANSWER Hertz
What unit of measurement is used for amplitude (intensity) of sound? - ANSWER
Decibels
An impulse or impact sound can be described as:
1. an intense sound with __________ duration.
2. a sound that should be _____________ in a noise survey
3. A noise lasting less than ________ second - ANSWER 1. short
2. quantified
3. 1 second
A sound with varying frequency, amplitude, and temporal characteristics best describes
a ______________ sound. - ANSWER complex
Temporal characteristics of sound include all except:
A. Continuous
B. Intermittent
C. Steady State
D. Pure Tone - ANSWER Pure Tone
The Permissible Exposure Limit is the limit that should not be _________. The Action
Level (AL) is the trigger for employers to
_________________________________________. - ANSWER Exceeded ; enroll
people in a Hearing Conservation Program
Explain how to determine sound levels when the sound in an area is at 85 dB(A) and
another piece of equipment is added with a sound level of 85 dB(A)... - ANSWER plus 3
dB increase to larger number.
A hearing conservation program should include:
1. __________________ controls to reduce noise levels
2. The use of _______________ ___________________.
3. ________________ _________________ testing - ANSWER 1. engineering
2. hearing protection
3. Annual audiometric
________ measurements are unweighted and therefore referred to as just dB. -
ANSWER Z
_______ weighting is mostly used for measuring impulse sounds like that generated by
weapons. - ANSWER Z
Human Hearing Frequency Range is ______ to _____________ Hz. - ANSWER 20 to
20,000 Hz
Unit of measurement for frequency (pitch) - ANSWER Hertz (Hz) or Kilohertz (kHz)
Time-Weighted Average changes if an employee works longer than _____ hour shifts. -
ANSWER 8 hour
Time-Weighted Average calculates ________________________ or dB____ and the
________________ of noise exposure. - ANSWER Amplitude ; dB(A) ; duration
According to OSHA, the ACTION LEVEL (AL) at which workers should be included in a
hearing conservation program occurs when they are exposed to a consistent sound
level of ___________ dB_____ for an entire ____-hour shift. - ANSWER 85dB(A) ; 8-
hour shift
According to OSHA, the permissible exposure limit (PEL) for 8 hours that should not be
exceeded is: - ANSWER 90 dB(A)
Several government agencies, including ______, _________, FRA, and individual state
and local governments, develop and publish noise related regulations requiring
compliance by employers. - ANSWER OSHA ; DoD
If more than one regulation applies to a workplace, be sure to follow the most
_______________ one. - ANSWER Stringent
Regardless of the 8-hour average, impact or impulse noise exposure should never
exceed ___________ dB(P) - ANSWER 140 dB(P)
If the 8-hour Time-Weighted Average is 90 dB(A) or above, the Permissible Exposure
Limit has been reached and additional requirements apply. These include:
1. The use of __________ __________ becomes mandatory.
2. Employers must consider feasible ________________ or ________________
controls to reduce noise exposure.
3. Employers must ensure hearing protection reduces sound levels reaching the ear to
below ________ db_____. - ANSWER 1. hearing protection
2. engineering or administrative
3. 90 dB(A)
Noise exposures are considered likely to be harmful if shouting is required in order to
communicate to a person __________ feet away. - ANSWER 3 feet
The primary role of CAOHC is to advocate for comprehensive programs that promote
_____________ ________________ in occupational hearing conservation. - ANSWER
Best Practices
, Which is true about the characteristics of sound called "frequency" (pitch, like piano
notes)? It is measured in _____________. - ANSWER Hertz
What unit of measurement is used for amplitude (intensity) of sound? - ANSWER
Decibels
An impulse or impact sound can be described as:
1. an intense sound with __________ duration.
2. a sound that should be _____________ in a noise survey
3. A noise lasting less than ________ second - ANSWER 1. short
2. quantified
3. 1 second
A sound with varying frequency, amplitude, and temporal characteristics best describes
a ______________ sound. - ANSWER complex
Temporal characteristics of sound include all except:
A. Continuous
B. Intermittent
C. Steady State
D. Pure Tone - ANSWER Pure Tone
The Permissible Exposure Limit is the limit that should not be _________. The Action
Level (AL) is the trigger for employers to
_________________________________________. - ANSWER Exceeded ; enroll
people in a Hearing Conservation Program
Explain how to determine sound levels when the sound in an area is at 85 dB(A) and
another piece of equipment is added with a sound level of 85 dB(A)... - ANSWER plus 3
dB increase to larger number.
A hearing conservation program should include:
1. __________________ controls to reduce noise levels
2. The use of _______________ ___________________.
3. ________________ _________________ testing - ANSWER 1. engineering
2. hearing protection
3. Annual audiometric
________ measurements are unweighted and therefore referred to as just dB. -
ANSWER Z
_______ weighting is mostly used for measuring impulse sounds like that generated by
weapons. - ANSWER Z
Human Hearing Frequency Range is ______ to _____________ Hz. - ANSWER 20 to
20,000 Hz
