ACTIVITY/OBJECT | dB(A) |
Quiet bedroom | 20 - 30 |
Daytime levels in
quiet residential area |
35 - 45 |
Busy central office | 50 - 60 |
Lawnmower at 15 metres | 70 |
Jack hammer at 1 metre | 100 |
Jet aircraft taking off at 25 metres | 140 |