Safe exposure times vs. SPL
Duration per day
Sound level (dB, C weighted)
8 hr
85
4 hr
88
2 hr
91
1 hr
94
30 min
97
15 min
100
7 min 30 sec
103
3 min 45 sec
106
1 min 52 sec
109
56 sec
112
28 sec
115
none
> 115
Ref: NIOSH