2
Your hearing is very important to you and to us so please take care when operating this
equipment. The following guidelines are provided for your information.
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.
Remember listening for prolonged period of time at high volume levels will harm you
hearing.
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
30 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 1 Metre, food mixer.
90 Motorcycle, heavy goods vehicle, petrol lawn mower
100 Pneumatic drill , chain saw, garbage truck, discotec / night-club.
120 Rock band concert , thunderclap, fast train passing by.
140 THRESHOLD OF PAIN Gunshot, jet plane taking off.
180 Rocket Launching pad.
1. IMPORTANT NOTES
Summary of Contents for GCD524R
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