8
CORRECT
INCORRECT
FROM THE CENTRE TO THE EDGE
COMPACT DISC MAINTENANCE
1.
Always use a compact disc bearing the mark as shown.
2.
Notes on handing discs
z
Removing the disc from its storage case and loading it.
z
Do not touch the reflective recorded surface.
z
Do not stick paper or write anything on the surface.
z
Do not bend the disc.
3.
Storage
z
Store the disc in its case.
z
DO not expose discs to direct sunlight or high temperatures, high humidity or dusty
places.
4.
Cleaning a disc
z
Should the disc become soiled, wipe off dust, dirt and fingerprints with a sort cloth.
z
The disc should be cleaned from the center to the edge.
z
Never use benzene, thinners, record cleaner fluid or anti-static spray.
z
Be sure to close the CD door, so the lens is not contaminated by dust.
z
Do not touch the lens.
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
y
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.
y
Slowly increase the level until you can hear comfortably and clearly and without distortion.
y
Damage to your hearing is accumulative and is irreversible.
y
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.
9
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.
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.
