Sound Intensity/SIL
	Sound Source                   Intensity/SIL Saturn rocket at 50 m                                   108   = 200 dB Jet engine at 10 m                                         103    = 150 dB Jet engine at 50 m                                         10     = 130 dB SST takeoff at 500 m; Pneumatic drill       100    = 120 dB Amplified Rock Music                                 10-1  = 110 dB Machine shop                                                10-2  = 100 dB Jackhammer at 1 m; Subway train             10-3  =   90 dB Factory                                                            10-4  =    80 dB