Steren BAF-1280, Руководство пользователя

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Used wisely, your new sound equipment will provide a lifetime of fun
and enjoyment. Since hearing damage from loud noise is often
undetectable until it is too late.
Steren recommend you avoid prolonged exposure to excessive noise.
This list of sound levels is included for your protection.
The following noises can be dangerous under constant exposure:
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90 Subway, motorcycle, lawn mower
100 Pneumatic drill, garbage truck
120 Rock band concert in front of speakers, thunderclap
140 Gunshot blast, jet plane
180 Rocket launching pad
Level (Decibels) Example
30 Quiet library, soft whispers
40 Living room, refrigerator, bedroom
50 Light traffic, normal conversation, quiet office
60 Air conditioner at 20ft, sewing machine
70 Vacuum cleaner, hair dryer, noisy restaurant
80 Average city traffic, alarm clock at two feet