Stereo Sound System; Operation Tips; How Car Audio Works - Hyundai 2001 Sonata Owner's Manual

It operates to prevent pollutant enter the car
and to purify the air.
CAUTION:
o Replace the filter every 12,000 miles
(20,000 km) or once a year.
If the car is being driven in severe condi-
tions such as dusty, rough roads, more
frequent air filter inspections and chang-
es are required.
o When the air flow rate is suddenly de-
creased, it must be checked at autho-
rized dealer.
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Operation Tips

o If the interior of the car is hot when you first
get in, open the windows for a few minutes
to expel the hot air.
o When you are using the air conditioning
system, keep all windows closed to keep
hot air out.
o When moving slowly, as in heavy traffic,
shift to a lower gear. This increases engine
speed, which in turn increases the speed of
the air conditioning compressor.
o On steep grades, turn the air conditioning off
to avoid the possibility of the engine over-
heating.
o During winter months or in periods when the
air conditioning is not used regularly, run the
air conditioning once every month for a few
minutes. This will help circulate the lubri-
FEATURES OF YOUR HYUNDAI
cants and keep your system in peak operat-
ing condition.
B750A01A-AAT

STEREO SOUND SYSTEM

How Car Audio Works

FM reception
AM and FM radio signals are broadcast from
transmitter towers located around your city.
They are intercepted by the radio antenna on
your car. This signal is then received by the
radio and sent to your car speakers.
When a strong radio signal has reached your
vehicle, the precise engineering of your audio
system ensures high quality reproduction. How-
ever, in some cases the signal coming to your
vehicle is not strong and clear. This can be due
to factors such as the distance from the radio
station, closeness of other strong radio stations
or the presence of buildings, bridges or other
large obstructions in the area.
AM reception
Ionosphere
AM signal reception is usually better than FM
reception. This is because AM radio waves are
transmitted at low frequency. These long, low
frequency radio waves can follow the curvature
of the earth rather than travelling straight out
into the atmosphere. In addition, they curve
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around obstructions so that they can provide
better signal coverage. Because of this, clear
AM broadcasts can be received at greater dis-
tances than FM broadcasts.
Ionosphere
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