Permissible Exposure Duration (5 dB Rule)

Permissible Exposure Duration (5 dB Rule)

NO-01
ASPCSPFoundational

Formula
T = 8 ÷ 2^((L−90)/5)
When to Use

Determine the maximum time a worker may be exposed to a given noise level under OSHA's 5 dB exchange rate.

Symbol Legend
SymbolMeaningUnitNote
TPermissible exposure timehours
LSound leveldB
Note: T8 ÷ 2^/5)(L−90

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