04-30-2012, 05:39 PM
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#11 (permalink)
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Enthusiast Member
Join Date: Jul 2009
Location: Occupied California
Posts: 423
Drives: '09 Tour/Sport/6MT
Rep Power: 17
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Quote:
Originally Posted by RiCharlie
What we really need is some accurate sound measuring device that can tell exactly how much difference these mods make..Anyone?
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I have thought about this: there is a stretch of freeway that I travel that has various surfaces and really plays a symphony, or rather cacophony with the tires. The thing to do would be to use a recording measuring device and travel a certain section of road, long enough to get a good reading. Maybe 10 miles. Stay in one lane, at one speed as much as possible, A/C and stereo off & windows up. Take a measurement maybe every 10 seconds with the microphone in a fixed location, like attached to the inside driver side headrest strut. Install the Dynamat & repeat the test. Print out the graphs or plots and look at the difference in SPL at the same locations and elapsed time. There you go.
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