|
NOISE EXPOSURE TIME LIMITATIONS
|
|
Noise Level
|
Exposure Limits
|
|
90 dB
|
8 hrs
|
|
95 dB
|
4 hrs
|
|
100 dB
|
2 hours
|
|
105 dB
|
1 hour
|
|
110 dB
|
30 minutes
|
|
115 dB
|
15 minutes
|
|
GUNFIRE NOISE LEVELS
|
|
156 dB
|
.38 Special, 12 gauge 26" barrel
|
|
164 dB
|
.44 Mag
|
| 170
dB |
.338
Rifle with muzzel brake |
|
ENVIRONMENTAL NOISE LEVELS
|
|
140 dB
|
Space rocket at blastoff
|
|
130 dB
|
Jackhammer |
|
120 dB
|
Ambulance siren, Amplified rock band, Thunder clap |
|
115 dB
|
Sandblasting
|
|
110 dB
|
Woodworking shop
|
|
100 dB
|
Pneumatic drill, Chainsaw |
|
90 dB
|
Lawn mower, Disco dance music, Shop tools, Truck
traffic, Noisy restaurant
|
|
80 dB
|
City traffic, Loud music from radio
|
|
75 dB
|
Kitchen appliances
|
|
70 dB
|
Crowded restaurant
|
|
65 dB
|
Conversation speech
|
|
60 dB
|
Sewing machine, Typewriter
|
|
50 dB
|
Average home interior
|
|
40 dB
|
Quiet residential community
|
|
30 dB
|
Whisper at five feet
|
|
20 dB
|
Leaves rustling in a breeze
|
|
10 dB
|
Normal breathing
|
|
0 dB
|
Faintest sound heard by a human ear
|
