BMW x5 2001 Manual De Usuario

Index

Data

Technology

Repairs

Car care

Controls

Overview

199

DSP sound system

Rearview mirrors with automatic dimmer

The DSP Professional premium sound
system features a special amplifier
combined with Digital Sound
Processing (DSP) and integrated
speakers to surround you with crisp,
true-to-life sound reproduction. The
speaker system's subwoofers, woofers,
midrange speakers and tweeters
furnish you with an impressively full-
bodied listening experience. The indi-
vidual components are oriented so as
to produce the aural sensation that you
would experience facing the stage in a
concert hall. The system also automati-
cally adjusts the bass and treble
settings to compensate for changes in
volume and vehicle speed.

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The interior and exterior rearview
mirrors with automatic dimming feature
reduce glare from following traffic by
adapting the intensity of the reflected
images to correspond to levels of light
registered by the unit's sensors. The
mirrors revert to their undimmed setting
as soon as the light source disappears.
A forward facing sensor is mounted on
the front of the interior mirror housing
and is designed to monitor light levels
in the area forward of the vehicle.
A second sensor is integrated within
the mirror's glass. The electronic
control system operates by comparing
the respective levels of luminous inten-
sity in front of and behind the vehicle.

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The difference provides the basic
parameter used to modulate an elec-
trical current and induce chemical
changes in a semisolid layer incorpo-
rated in the lenses.

The semisolid reacts chemically to this
electrical current, thus providing
dimming of the mirrors through an infi-
nitely-variable range (electrochromic
technology).

As a result, it is no longer necessary to
dim the interior mirror manually, and the
driver can concentrate completely on
traffic conditions.