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4-2. Audio System
4
Interior Features
Operating Tips for Audio System
Do not spill any liquid on the audio
system.
●To prevent the battery from being discharged, do not leave the audio system
on for a long period of time when the engine is not running.
● If a cellular phone or CB radio is used in or near the vehicle, it could cause
noise to occur from the audio system, however, this does not in dicate that
the system has been damaged.
WARNING
■ Always adjust the audio wh ile the vehicle is stopped
Do not adjust the audio control switches while driving the vehi cle. Adjusting
the audio while driving the vehicle is dangerous as it could di stract your
attention from the vehicle operation which could lead to a seri ous accident.
Even if the audio control switches are equipped on the steering wheel, learn
to use the switches without looking down at them so that you ca n keep your
maximum attention on the road while driving the vehicle.
NOTICE
For the purposes of safe driving, adjust the audio volume to a level that
allows you to hear sounds outside of the vehicle including car horns and
particularly emergency vehicle sirens.
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■AM characteristics
AM signals bend around such things as buildings or mountains and
bounce off the ionosphere.
Therefore, they can reach lon ger distances than FM signals.
Because of this, 2 stations may sometimes be picked up on the
same frequency at the same time.
Ionosphere
Station 1
Station 2
■FM characteristics
An FM broadcast range is usually about 25 - 30 miles (40 - 50 km)
from the source. Because of extra coding needed to break the
sound into 2 channels, stereo FM has even less range than monau -
ral (non-stereo) FM.
FM Station
25 - 30 miles (40 - 50 km)
Radio Reception
1
2
3
1
2
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4
Interior Features
Signals from an FM transmitter are similar to beams of light
because they do not bend around corners, but they do reflect.
Unlike AM signals, FM signals cannot travel beyond the horizon.
Therefore, FM stations cannot be received at the great distance s
possible with AM reception.
Ionosphere
FM wave
AM wave
60 - 120 miles (100 - 200 km)
Obstruction
Atmospheric conditions can also affect FM reception. High humidity
will cause poor reception. However , cloudy days may provide better
reception than clear days.
1
2
3
4
5
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4-2. Audio System
●Multipath noise
Since FM signals can be reflect ed by obstructions, it is possible
to receive both the direct signal and the reflected signal at the
same time. This causes a slight delay in reception and may be
heard as a broken sound or a distortion. This problem may also
be encountered when in close p roximity to the transmitter.
Direct
Reflected wave
● Flutter/Skip noise
Signals from an FM transmit-
ter move in straight lines and
become weak in valleys
between tall buildings, moun-
tains, and other obstacles.
When a vehicle passes
through such an area, the
reception conditions may
change suddenly, resulting in
annoying noise.
● Weak signal noise
In suburban areas, broadcast
signals become weak
because of distance from the
transmitter. Reception in
such fringe areas is charac-
terized by sound breakup.
1
2
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4
Interior Features
●Strong signal noise
This occurs very close to a
transmitter tower. The broad-
cast signals are extremely
strong, so the result is noise
and sound breakup at the
radio receiver.
● Station drift noise
When a vehicle reaches the area o f 2 strong stations broadcast-
ing at similar frequencies, the original station may be tempora rily
lost and the second station picked up. At this time there will be
some noise from this disturbance.
Station 1
88.1 MHz
Station 2
88.3 MHz
MP3 stands for MPEG Audio Layer 3, which is standardized voice
compression establ ished by the ISO
*1 working group (MPEG).
Use of MP3 allows for audio data to be compressed to approximat ely
a tenth of the source data size.
This unit plays files with the extension (.mp3) as MP3 files.
*1: International Organization for Standardization
• When naming an MP3 file, be sure to add an MP3 file extension
(.mp3) after the file name.
• The number of characters which can be displayed is restricted.
1
2
Operating Tips for MP3
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4-2. Audio System
Supply of this product only conveys a license for private, non-commercial use
and does not convey a license nor imply any right to use this p roduct in any
commercial (i.e. revenue-generating) real time broadcasting (te rrestrial, satel-
lite, cable and/or any other medi a), broadcasting/streaming via the Internet,
intranets and/or other networks or in other electronic content distribution sys-
tems, such as pay-audio or audio-on-demand applications. An ind ependent
license for such use is required.
For details, please visit http://www.mp3licensing.com.
WMA is short for Windows Media Au dio and is the audio compression
format used by Microsoft.
Audio data can be created and stored at a higher compression ra tio
than MP3.
This unit plays files with the extension (.wma) as WMA files.
*: Microsoft and Windows Media are registered trademarks of Microsoft Cor-
poration U.S. in the United States and other countries.
• WMA files written under specifications other than the indicate d
specification may not play norma lly or files or folder names may not
display correctly.
• The file extension may not be provided depending on the comput er
operating system, version, softw are, or settings. In this case, add
the file extension “.wma” to t he end of the file name, and then write
it to the memory.
NOTICE
Do not use an audio file extension on files other than audio fi les. In addition,
do not change the audio file extension. Otherwise, the unit wil l not recog-
nize the file correctly resulting in noise or a malfunction.
Operating Tips for WMA
NOTICE
Do not use an audio file extension on files other than audio fi les. In addition,
do not change the audio file extension. Otherwise, the unit wil l not recog-
nize the file correctly resulting in noise or a malfunction.
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4
Interior Features
AAC stands for Advanced Audio Coding, which is standardized voice
compression established by the ISO
*1 working group (MPEG). Audio
data can be created and stored at a higher compression ratio th an
MP3.
This unit plays files with the extensions (.aac/.m4a/.wav) as t he AAC
files.
• AAC files written under specifications other than the indicate d spec-
ification may not play normally or files or folder names may no t dis-
play correctly.
• The file extension may not be provided depending on the comput er
operating system, version, softw are, or settings. In this case, add
the file extension “.aac”, “.m4a”, or “.wav” to the end of the file
name, and then writ e it to the memory.
*1: International Organization for Standardization
Operating Tips for AAC
NOTICE
Do not use an audio file extension on files other than audio fi les. In addition,
do not change the audio file extension. Otherwise, the unit wil l not recog-
nize the file correctly resulting in noise or a malfunction.
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4-2. Audio System
OGG is the audio compression format for Xiph. Org Foundation.
Audio data can be created and stored at a higher compression ratio
than MP3.
This unit plays files with the extension (.ogg) as OGG files.
• OGG files written under specific ations other than the indicated
specification may not play norma lly or files or folder names may not
display correctly.
• The file extension may not be provided depending on the comput er
operating system, version, softw are, or settings. In this case, add
the file extension “.ogg” to th e end of the file name, and then write it
to the disc.
This unit plays audi o files as follows:
MP3/WMA/AAC/OGG
*1 files written under specifications other than
the indicated specification may not play normally or files/folder names
may not display correctly.
Operating Tips for OGG
NOTICE
Do not use an audio file extension on files other than audio fi les. In addition,
do not change the audio file extension. Otherwise, the unit wil l not recog-
nize the file correctly resulting in noise or a malfunction.
Operating Tips for USB device
ExtensionPlayback with this unit
.mp3MP3
.wmaWMA
.aac
AAC.m4a
.wav
.oggOGG