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Message: <blockquote data-quote="hispls" data-source="post: 8814482" data-attributes="member: 614752">Point of reference for this sort of thing is meant to be 1 meter away from the sound source in an an-echoic chamber.  You probably don't have access to that and you can't do anything about reflection off of the ground but you could be most of the way there on a quiet day in the desert.   Doing RTA or sweep would likely be very informative to compare response to predicted (should be much closer to the WinISD graph outside).There should not be any frequency below 100hz where this will be louder outside the vehicle.</blockquote>

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