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Old 12-04-2015, 08:19 PM   #32 (permalink)
ConnClark
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Das Schlepper Frog - '85 Mercedes Benz 300SD
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Quote:
Originally Posted by aerohead View Post
A lot of these are added after time in an anechoic wind tunnel,where wind noise was discovered.The tab changes the resonant frequency of the part,killing the noise,and very little is spent on tooling modifications to mass produce this change.
The EPA has stringent noise criteria for cars.Even tires.
One should note that noise takes energy to create
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