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Old 07-19-2015, 06:45 PM   #3
cajun1le
The Mechanic
 
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Drives: a sports car
Join Date: Dec 2011
Location: Louisiana
Posts: 316
I don't hear anything other than the sound of the suspension/tires/body dampening the bumpy road surfaces. Every time the sound occurs it coincides with a physical vibration from the road (phone shakes in lock step with the sound).
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