15
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 continous 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 lever.
Slowly increase the lever 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 levers will harm your
hearing.
Once you have established a comfortable listening lever, 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
Lever (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 Motorcylce, heavy goods vehicle, petrol lawn mower.
100 Pneumatic drill, chain saw, garbage truck, discotheque / night-club
120 Rock band concert, thunderclap, fast train passing by.
PERMANENT LOSS OF HEARING
40 THRESHOLD OF PAIN Gunshot 2 feet away, jet plane taking off.
180 Rocket Launching pad.
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