Decibel
Level Example
30 Quiet library, soft whispers
40Living room, refrigerators, bedroom away from traffic
50Light traffic, normal conversation, quiet office
60Air conditioner at 20 feet, sewing machine
70Vacuum cleaner, hair dryer, noisy restaurant
80Average city traffic, garbage disposals, alarm clock at two feet
THE FOLLOWING NOISES CAB BE DANGEROUS UNDER CONSTANT EXPOSURE:
90Subway, motorcycle, truck traffic, lawn mower
100 Garbage truck, chain saw, pneumatic drill
120 Rock band concert in front of speakers, thunderclap
140 Gunshot blast, jet engine
180 Rocket launching pad
Information courtesy of the Deafness Research Foundation.
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