SPECIAL CERAMIC IS KEY TO STOPPING WINDSCREENS BEING AUTO-NOISE LOUD SPEAKERS
September 1st, 2008
BY KEITH NUTHALL
WINDSCREENS are not such something to look through, say European Union (EU) scientists: they also act as loud speakers, attracting and magnifying noise created by a car, reflecting the racket back at drivers and passengers alike. This has made researchers in the EU-funded InMAR ('Intelligent Materials for Active Noise Reduction') project consider how make windscreens absorb noise rather than amplify it.
The key is piezoelectric ceramics. In standard cars, vibrations created by a vehicle's operation shudder through the body and reach the ...
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