Sound Intensity
u
Sound Source
Intensity (W/m
2
)
u
Saturn rocket at 50 m
10
8
u
Jet engine at 10 m
10
3
u
Jet engine at 50 m
10
u
SST takeoff at 500 m; Pneumatic drill
10
0
= 1
u
Amplified Rock Music
10
-1
u
Machine shop
10
-2
u
Jackhammer at 1 m; Subway train
10
-3
u
Factory
10
-4