Steren BAF-0880, Руководство пользователя

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ENGLISH
ENGLISH-03
This list describes the decibel levels of certain sounds for your
protection
Db Level
(Decibel) Example
30 Quiet library, whispers
40 Sitting room, refrigerator, bedroom
50 Light traffic, normal conversation, quiet office environment
60 Air conditioner at 15 feet, sewing machine
70 Vacuum cleaner, hair dryer, noisy restaurant
80 Heavy traffic, Alarm clock at 2 feet
The following Sound levels may be dangerous is exposed for an
extended period of time.
Db Level
(Decibel) Example
90 Subway, motorcycle, lawnmower
100 Garbage truck
120 Rock concert in front of the speakers
140 Firearm, airplane
180 Rocket launch