MX-KB 4(J).book Page 1 T uesday, February 24, 2004 5: 10 PM
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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 recognizing just how loud you have set the volume level.
DECIBEL
Level dB Example
30dB Quiet library, soft whisper.
40dB Living room, fridge freezer bedroom away from traffic.
50dB Normal conversation, quiet office, light traffic.
60dB Electric sewing machine.
70dB 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.
100dB Pneumatic drill, chain saw, garbage truck, discotec / night-club.
120dB Rock band concert, thunderclap.
PERMANENT LOSS OF HEARING
140dB TNRESHOLD OF PAIN Gunshot 2 feet away.
180dB Rocket Launching pad.
