Exam (elaborations)
CAOHC- Exposure Criteria (1
- Course
- MIE 305 NCSU Chapters 1-4
- Institution
- MIE 305 NCSU Chapters 1-4
CAOHC- Exposure Criteria (1
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CAOHC- Exposure CriteriaPermissible Exposure Limit (PEL) - ANS-The TWA, which when exceeded, requires feasible
engineering and MSHA/ or OSHA administrative controls, and mandatory hearing protection
PEL (OSHA) - ANS-PEL = 90 dBA TWA. PEL is exceeded when TWA > 90 dBA, integrating all
sounds from 90-140 dBA
PEL (MSHA) - ANS-Similar to OSHA, except integration range explicit in regulation and is for all
sounds from 90 to at least 140 dBA
PEL (FRA-railroad) - ANS-Same as OSHA
PEL (NIOSH) - ANS-Recommended Exposure Level (REL) = 85 dBA TWA. REL is exceeded
when TWA is greather than or equal to 85 dBA, integrating all sounds 80-140
Action Level - ANS-The TWA exposure that requires program inclusion, hearing tests, training,
and optional hearing protection
Action Level (OSHA) - ANS-85dB TWA. AL is exceeded when TWA is greater than 85 DBA,
integration all sounds from 80-130dBA
Action Level (MSHA) - ANS-Similar to OSHA, except integration is for all sounds 90 to at least
130 dBA
Action Level (FRA) - ANS-Same as OSHA-85dB TWA. AL is exceeded when TWA is greater
than 85 DBA, integration all sounds from 80-130dBA
Action Level (NIOSH) - ANS-Does not have AL, but REL is 85dBA TWA for hearing loss
prevention, noise controls and HPD's
Exchange Rate - ANS-The rate at which exposure accumulates; the change in dB TWA for
halving/doubling of allowable exposure time
Exchange rate (OSHA) - ANS-5 dB
Exchange rate (MSHA) - ANS-5 dB
Exchange rate (FRA) - ANS-5 dB
Exchange rate (NIOSH) - ANS-3 dB
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