Forum Discussion
L2R
Dec 07, 2014Explorer
I would probably look at what automotive companies do. that is, insulation like I see on the underside of a car hood.  JC whitney comes to mind or google car sound 
or
insulation.http://www.stockinteriors.com/HeatSound.asp?Itemid=4783&gclid=CjwKEAiAkpCkBRCtstKQo5ia5nESJACsCikRPB5ZujzRPNrX1kHBEyolZBZPlKFBjyI4Ml372B4tLxoCoqLw_wcB
or
insulation.http://www.stockinteriors.com/HeatSound.asp?Itemid=4783&gclid=CjwKEAiAkpCkBRCtstKQo5ia5nESJACsCikRPB5ZujzRPNrX1kHBEyolZBZPlKFBjyI4Ml372B4tLxoCoqLw_wcB
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