Sound Pressure Level - OSHA A-Weighted per Day

OSHA maximum A-weighted sound pressure levels allowed per day. Maximum A-weighted sound pressure levels allowed by the U.S. Occupational Safety and Health Administration (OSHA) for periods in a working day.

Duration per Day (hr)	Maximum Allowed Sound Pressure Level (dBA)
8	90
6	92
4	95
3	97
2	100
1.5	102
1	105
0.5	110
less than 0.25	115