Insignia NS-R5111 사용자 설명서
NS-R5111 Arm Band Radio
9
www.insignia-products.com
Safe sound levels*
To establish a safe sound level:
•
Start with the volume control at a low setting.
•
Slowly increase the sound until you can hear it comfortably
and clearly, without distortion.
and clearly, without distortion.
•
Avoid prolonged exposure to excessive noise.
Level Example
30
30
Quiet Library, soft whispers
40
Living room, refrigerator, bedroom away from
traffic
traffic
50
Light traffic, normal conversation, quiet office
60
Air conditioner at 20 feet, sewing machine
70
Vacuum cleaner, hair dryer, noisy restaurant
80
Average city traffic, garbage disposals, alarm clock at
two feet
two feet
The following noise levels can be dangerous with constant
exposure:
exposure:
90
Subway, motorcycle, truck traffic, lawn mower
100
Garbage truck, chain saw, pneumatic drill
120
Rock band concert in front of speakers,
thunderclap
thunderclap
140
Gunshot blast, jet engine
180
Rocket launching pad
*Information courtesy of the Deafness Research Foundation.