Exposure reference

OSHA 90 dBA for 8 hours with a 5 dB exchange, and NIOSH 85 dBA for 8 hours with a 3 dB exchange. Formula time is 8 / 2^((L - criterion) / exchange).

Dose percent is 100 × hours / formula hours for one period. This is not a hearing, medical, or legal decision. dB is not converted to dBA.