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Time-weighted Average (TWA) from Noise Dose Calculator


Calculator determines 8-hour time-weighted average exposure for a noise dose.

A dose of 100% is equivalent to the maximum permissable noise level of an 8-hour TWA of 90 dBA.

OSHA uses a 5 dB exchange rate where 85 dBA is a dose of 50% and 95 dBA is a dose of 200%.


Want to convert exposures into a time-weighted average?

Try our TWA calculator