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<blockquote data-quote="audioholic" data-source="post: 3499359" data-attributes="member: 549629">Its funny, years ago when everyone was using asphalt based mats (butyl wasnt out yet), the big buzz word/phrase was visceolastic energy transfer. but I/we know now that asphalt based mats had virtually none, while the butyl mats do exhibit the phenomenon.How much it will heat, I suspect, will be unmeasureable with a thermometer. Interesting test though, let us know what happens.In any event, the main function the mat will perform will be mass loading in order to lower the resonant freq of the vibrations, not actually transferring wave energy into heat.Finally, there is an alternative for minimizing vibrations in a panel that is rarely talked about... stiffening the panel. For example, I like using wood or other such materials, in panels, screwed to door panels strategically to stiffen the panel (in addition to using mat). Another example is using fiberglass. Fiberglass will stiffen a roof to the point it will NOT flex, if given enough layers. And will weigh less than the traditional method of slapping up mat to mass load it (and that may fall down). Fiberglass can even be applied to back of plastic interior panels to give them rigidity. At the risk of using a cliche, soemtimes it pays to think outside the box.</blockquote>

[QUOTE="audioholic, post: 3499359, member: 549629"] Its funny, years ago when everyone was using asphalt based mats (butyl wasnt out yet), the big buzz word/phrase was visceolastic energy transfer. but I/we know now that asphalt based mats had virtually none, while the butyl mats do exhibit the phenomenon. How much it will heat, I suspect, will be unmeasureable with a thermometer. Interesting test though, let us know what happens. In any event, the main function the mat will perform will be mass loading in order to lower the resonant freq of the vibrations, not actually transferring wave energy into heat. Finally, there is an alternative for minimizing vibrations in a panel that is rarely talked about... stiffening the panel. For example, I like using wood or other such materials, in panels, screwed to door panels strategically to stiffen the panel (in addition to using mat). Another example is using fiberglass. Fiberglass will stiffen a roof to the point it will NOT flex, if given enough layers. And will weigh less than the traditional method of slapping up mat to mass load it (and that may fall down). Fiberglass can even be applied to back of plastic interior panels to give them rigidity. At the risk of using a cliche, soemtimes it pays to think outside the box. [/QUOTE]

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