Qtx PAJ-12A Manual - page 3
Used wisely, your new powered speaker will provide many years of
reliable sound reinforcement. Though note that hearing damage can
be caused by loud noise is often undetectable until it is too late.
We recommend that you avoid prolonged exposure to excessive
noise. This list of sound levels is included for your protection.
The following sound levels can be dangerous under constant exposure:
Level (Decibels)
Example
30 40 50 60 70 80
Quiet library, soft whispers Living room, refrigerator,
bedroom Light traffic, normal conversation, quiet office
Air conditioner at 20ft, sewing machine Vacuum cleaner,
hair dryer, noisy restaurant Average city traffic, alarm
clock at two feet
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