A car alarm is an electronic device installed in a vehicle in an attempt to discourage
theft of the vehicle itself, its contents, or both. Car alarms work by emitting
high-volume sound (usually a siren, klaxon, pre-recorded verbal warning,
the vehicle's own horn, or a combination thereof) when the conditions necessary
for triggering are met, as well as by flashing some of the vehicle's lights,
and (optionally) notifying the car's owner via a paging system and interrupting
various electrical circuits necessary for the car to start.
A stock
car audio system refers to one that was specified by the manufacturer when the
car was built. A custom car audio installation can involve anything from the upgrade
of the radio to a full-blown customization of a car based around its audio
equipment. Events are held where entrants compete for the loudest or most innovative
systems.
The most common and familiar piece of audio equipment
is the radio/tape player/CD player/DVD Player which is generically described
as a Head unit, which also can be called a head deck, after older tape decks.
It is also the most likely component to be upgraded with an after market item.
A recent development in head unit technology has been the addition of CD players
with MP3, Ogg, WMA, AAC, and USB, Bluetooth and Wi-Fi support. Even with the
rampant ubiquity of solid state MP3 players, car audio systems with line-in jacks
and other standards are only in their infancy, and that since tape adaptors
are often used with tape players, people are now viewing car radios with built-in
CD players as "misfeatures" of the audio system since people now often "rip"
their CDs onto their computers.Other types include the video touch screen capable
of controlling; navigation, dvd movies, mp3 players back up camera and other
accessories. |
