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EnglishAdvanced technology -> BMW active seat for your BMW 7 Series 2001-2007
190nRadio reception
BMW active seat*
Although numerous factors combine to
impose inherent limitations on the re-
ception quality available from mobile
radios, specially designed systems can
be employed to minimize their effects:
With radio stations which broadcast
over multiple frequencies, the "Radio
Data System" (RDS) ensures that the
frequency with the best reception qual-
ity will automatically be selected.
The Diversity Antenna system employs
several FM antennas integrated within
the rear window to provide three sepa-
rate sources for receiving broadcast
waves. An integral processor automati-
cally selects the antenna with the best
FM reception quality at any given time.
Because the ongoing antenna selection
process is completed within millisec-
onds, it remains inaudible to the radio
listener.
The active seat is an advanced devel-
opment in BMW seats. These seats are
engineered with orthopedic consider-
ations so that you will be less fatigued
during longer trips and sitting for long
periods without moving. The seat is no
longer a passive link between the road,
the running gear, and the driver. In-
stead, by means of an active modifica-
tion to the seat's surface, the seat
causes weight transfers which are
slight and imperceptible. The basic
seating position is not changed by this.
In the seat's upholstery, beneath the
surface of the seat, there is a cushion of
fluid on the left and right. The fluid is
slowly circulated back and forth be-
tween the cushions by means of a
pump.
Radio waves —mediumwave, long-
wave and shortwave —offer a wide
range of reception, because the broad-
cast signals travel not only along the
ground as surface waves, but also as
waves bounced back to earth from the
ionosphere.
Frequency-modulation (FM) provides
substantially better sound quality than
AM. However, because FM transmis-
sions rely on line-of-sight broadcast
waves, their effective reception range is
limited.
Online Edition for Part No. 01 41 0 004 597 - © 08/99 BMW Group
BMW active seat*
Safety belt tensioner
DSP sound system*
191n
This causes a movement of the spinal
column which is barely detectable, to-
gether with an improvement in the flow
of blood to the intervertebral disks and
the muscle structure in the area of the
spinal column.
The passengers can experience less
muscle cramping, back pain in the lum-
bar region or symptoms of fatigue. As a
result, the active seat represents a sig-
nificant contribution to driving comfort
and driving safety.
The safety belt tensioner responds to The DSP Professional premium sound
severe collisions by tightening the belts system features a special amplifier
to ensure that occupants remain firmly
positioned in their seats. A gas-pres-
combined with Digital Sound Process-
ing (DSP) and integrated speakers to
sure system retracts the buckle assem- surround you with crisp, true-to-life
bly to tension the shoulder and lap belts sound reproduction.
within fractions of a second. This re-
duces the tendency to slide under the
lap belt.
The speaker system's subwoofers,
woofers, midrange speakers and tweet-
ers 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 set-
tings to compensate for changes in vol-
ume and vehicle speed.
Online Edition for Part No. 01 41 0 004 597 - © 08/99 BMW Group
