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Old 28th November 2011 | 10:26
  #4 (permalink)  
rudderrudderrat
 
Joined: Oct 2009
Posts: 1,270
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From: UK
Greetings code0,

I think they help the airflow to re-attach around the "sharp" angular edges of the front & side windows. The noise is mostly from the turbulent boundary layer that detaches at those sharp edges.
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