Noise Dose

Noise Dose

NO-02
ASPCSPFoundational

Formula
D = Σ(Ci ÷ Ti) × 100
When to Use

Calculate the cumulative noise dose as a percentage of the permissible limit. D ≥ 100% requires action.

Symbol Legend
SymbolMeaningUnitNote
DNoise dose%D ≥ 100% = overexposure
CiActual exposure time at each levelhours
TiPermissible exposure time at each levelhoursFrom T = 8/2^((L-90)/5)

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