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Message: <blockquote data-quote="Raven" data-source="post: 1152588" data-attributes="member: 558368">A good example of this is to take a 2"x4"x20', put your ear to one end, and have someone else softly tap the other side. The density of the lumber lets sound waves travel from one end to the other so easy, that you lose almost no SPL from the tap, even after 20 feet.All that aside, it could be good for a solid quarter/half dB. Assuming you can get a very high amount of pressure into the vehicle. Nothing big enough to make it worth the effort, mind you. =)</blockquote>

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