| Source |
Level, dBA |
| Military Jet at 100ft |
140 |
| Artillery Fire at 10 ft |
130 |
| Passengers Ramp at Jet Airliner |
120 |
| Discotheque |
110 |
| Textile Mill |
105 |
| Printing Plant |
100 |
| Platform of Subway Station |
100 |
| Jackhammer, 15 meter |
97 |
| Generator Room |
90 |
| Unmuffled Diesel Engine at 130 ft |
90 |
| Heavy Truck, 15 meter |
85 |
| Concrete Mixer, 15 meter |
80 |
| Computer Printout Room |
80 |
| Inside Auto, 64km/hr |
76 |
| Vacuum Cleaner, 3 meter |
70 |
| Freight Train at 100 ft |
70 |
| Auto, Pass by, 30 meter |
65 |
| Conversational Speech at 3 ft |
60 |
| Large Transformer, 15 meter |
58 |
| Urban Area |
55 |
| Window Air Conditioner |
50 |
| Suburban Area |
45 |
| Quiet Country Setting |
35 |
| Soft Whisper, 2 meter |
35 |
| Empty Broadcast Studio |
28 |
| North Rim, Grand Canyon |
25 |
| Threshold of Good Hearing |
10 |
| Threshold of Excellent Hearing – Youths |
0 |