Hyundai 2009 Sonata User Manual download pdf (Page 125)

1

FEATURES OF YOUR HYUNDAI

112

STEREO SOUND SYSTEM

B750A02A-AAT

How Car Audio Works

AM broadcasts can be received at greater

distances than FM broadcasts. This is

because AM radio waves are transmitted

at low frequencies. 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 around obstructions so that

they can provide better signal coverage.

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 the best

possible quality reproduction. However,

in some cases the signal coming to your

vehicle may not be 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.

FM broadcasts are transmitted at high fre-

quencies and do not bend to follow the

earth's surface. Because of this, FM broad-

casts generally begin to fade at short

distances from the station. Also, FM signals

are easily affected by buildings, mountains,

or other obstructions. These can result in

certain listening conditions which might

lead you to believe a problem exists with

your radio. The following conditions are

normal and do not indicate radio trouble:

Ionosphere

B750A02L

AM reception

Mountains

Buildings

Unobstructed

area

FM radio station

B750A03L

Ionosphere

FM reception

B750A01L

Obstructed area

Iron bridges

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