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179n
DSP sound system* Rearview mirrors with automatic dimmer*
The DSP Professional premium sound
system features a special amplifier
combined with Digital Sound Process-
ing (DSP) and integrated speakers to
surround you with crisp, true-to-life
sound reproduction. The speaker sys-
tem's subwoofers, woofers, midrange
speakers and tweeters furnish you with
an impressively full-bodied listening ex-
perience. The individual components
are oriented so as to produce the aural
sensation that you would experience
facing the stage in a concert hall. The
system also automatically adjusts the
bass and treble settings to compensate
for changes in volume and vehicle
speed.
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The interior and exterior rearview mir-
rors 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 con-
trol system operates by comparing the
respective levels of luminous intensity
in front of and behind the vehicle.
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The difference provides the basic pa-
rameter used to modulate an electrical
current and induce chemical changes in
a semisolid layer incorporated in the
lenses.
The semisolid reacts chemically to this
electrical current, thus providing dim-
ming 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.
Online Edition for Part No. 01 41 0 155 303 - © 12/99 BMW AG