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Article: New car audio system surrounds with sound
- Article from:
- Chicago Sun-Times
- Article date:
- June 24, 1996
- Author:
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Copyright informationCopyright 1996 Chicago Sun-Times. (Hide copyright information)
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A new car audio system being developed by Johnson Controls and
OnActive technologies will surround passengers with sound by
transforming the car's headliner into a single, giant speaker.
Top Down Surround Sound uses between two and eight paper-thin
transducers glued to the car's headliner. The system requires a
semi-rigid polyurethane headliner, specially designed by Johnson
Controls, to work; fiberglass and other headliner materials do not
exhibit the necessary audio qualities. The transducers have a
maximum thickness of four-tenths of an inch, and weigh between
one-half ounce and 5 ounces.
The transducers in the headliner handle mid-range and high
frequencies, in the 200-20,000 hertz ...
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