Table 1.

Current noise exposure guidelines^a.

Time to reach 100% noise dose	Exposure level (NIOSHb) (dBA)	Exposure level (OSHAc) (dBA)
15 min	100	115
30 min	97	110
1 h	94	105
2 h	91	100
4 h	88	95
8 h	85	90

^aAdapted from CDC (CDC 2018).

^bThe National Institute of Occupational Safety and Health.

^cOccupational Safety and Health Administration.