SIL and the Ear
uSIL (dB)    Occupational                Occasional
u     80            No limit                         4 hours
u     85            No limit                         2 hours
u     90            8 hours                           1 hour
u     95            4 hours                           30 minutes
u   100            2 hours                           15 minutes
u   105            1 hour                               8 minutes
u   110            30 minutes                       4 minutes
u   115            15 minutes                       2 minutes