Jwin JX-CD678 - Manual (Page 3)

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IMPORTANT NOTES
Your 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 whispers
40 Living room, fridge freezer bedroom away from traffi c.
50 Normal conversation, quiet office, light traffic.
60 Electric sewing machine.
70 Vacuum cleaner, hair dryer, noisy restaur ant.
THE FOLLOWING NOISES CAN BE HARMFUL UNDER CONSTANT EXPOSURE
80dB Average city traffic, alarm clock buzzer at 2 feet, 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.
PERMANENT LOSS OF HEARING
140 THRESHOLD OF PAIN Gunshot 2 feet away.
180 Rocket Launching pad.
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