Important Notes
Hearing is very important to you and to us so please take care when
operating this equipment. It is strongly recommended that you follow the
listed guidelines in order to prevent possible damage or loss of hearing:
ESTABLISH A SAFE SOUND LEVEL
●
Over time your hearing will adapt to continuous loud sounds and will
give the impression that the volume has in fact been reduced. What
seems normal to you may in fact be harmful. To guard against this
BEFORE YOUR HEARING ADAPTS
set the volume at a low level.
●
Slowly increase the level until you can hear comfortably and clearly and
without distortion.
●
Damage to your hearing is accumulative and is irreversible.
●
Any ringing or discomfort in the ears indicates that the volume is too
loud.
Once you have established a comfortable listening level, DO NOT
INCREASE THE SOUND LEVEL FURTHER.
The following list of typical sound levels may assist you in recognising just
how loud you have set the volume level.
DECIBEL
Level dB
Example
30dB
Quiet library, soft whisper.
40
Living room, fridge freezer bedroom away from traffic.
50
Normal conversation, quiet office, light traffic.
60
Electric sewing machine.
70
Vacuum cleaner, hair dryer, noisy restaurant.
THE FOLLOWING NOISE CAN BE HARMFUL UNDER CONSTANT
EXPOSURE
80dB
Average city traffic, alarm clock buzzer at 2 feet, food mixer.
90dB
Motorcycle, heavy goods vehicle, petrol lawn mower.
100
Pneumatic drill, chain saw, garbage truck, discotec / night-
club.
120
Rock band concert, thunderclap.
PERMANENT LOSS OF HEARING
140
THRESHOLD OF PAIN Gunshot 2 feet away.
180
Rocket Launching pad.
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GTV17WLCD (5030057001) 92.5.16.p65
2003/5/16, 下午 04:57
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