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HOW does dynamat work?
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<blockquote data-quote="jonathanengr1" data-source="post: 7364662" data-attributes="member: 633698"><p>I have searched and searched for an answer to this question and can't seem to find a comprehensive answer. There are numerous posts about "DOES it work?", but nothing about the theory behind how it works.</p><p></p><p>Thus-far, these are the two theories that seem to be eluded to:</p><p></p><p>1) By adding weight to the panel, it lowers the resonance frequency of the panel thus eliminating vibrations and "rattle"</p><p></p><p>2) It "stiffens" the panel thus reducing vibration.</p><p></p><p>There is also talk about it having soundproofing qualities, which doesn't appeal to me. Here's my application:</p><p></p><p>I have a pontoon boat with a pair of 10" DD subs enclosed in an area (area is roughly 2 feet x 2 feet x 3 feet) where three sides of the area are aluminum panels. I finally got the subs performing *incredibly* well (thanks to those who helped me out in the sub forum!), but when it hits low it's almost comical how much the panels kick in and out (looks like the cone of the sub), and at lower frequencies (lower than 50 to 60 hz) they audibly vibrate the panels--makes quite a noise!</p><p></p><p>Thus, I have an interest in reducing or eliminating the resonance from the panels, but DO NOT want to soundproof them. Someone--can't remember who--told me that I could likely stick a 1'x1' piece on the middle of each of the three panels and that would add enough weight to lower the resonance frequency below the audible limit. I just hate to stick a few small pieces on to find it doesn't work and then have to go in and put more around these areas making it look like a patchwork quilt.</p><p></p><p>I've also heard people say that there are other products out there just as good as Dynamat, and some you can even buy in your local hardware store (I think it was called "brown bread"?). Anyway, just trying to figure out the best solution to my problem, and trying to wrap my head around the theory of how Dynamat (or any similar solutions) actually does what it does. Thanks!</p></blockquote><p></p>
[QUOTE="jonathanengr1, post: 7364662, member: 633698"] I have searched and searched for an answer to this question and can't seem to find a comprehensive answer. There are numerous posts about "DOES it work?", but nothing about the theory behind how it works. Thus-far, these are the two theories that seem to be eluded to: 1) By adding weight to the panel, it lowers the resonance frequency of the panel thus eliminating vibrations and "rattle" 2) It "stiffens" the panel thus reducing vibration. There is also talk about it having soundproofing qualities, which doesn't appeal to me. Here's my application: I have a pontoon boat with a pair of 10" DD subs enclosed in an area (area is roughly 2 feet x 2 feet x 3 feet) where three sides of the area are aluminum panels. I finally got the subs performing *incredibly* well (thanks to those who helped me out in the sub forum!), but when it hits low it's almost comical how much the panels kick in and out (looks like the cone of the sub), and at lower frequencies (lower than 50 to 60 hz) they audibly vibrate the panels--makes quite a noise! Thus, I have an interest in reducing or eliminating the resonance from the panels, but DO NOT want to soundproof them. Someone--can't remember who--told me that I could likely stick a 1'x1' piece on the middle of each of the three panels and that would add enough weight to lower the resonance frequency below the audible limit. I just hate to stick a few small pieces on to find it doesn't work and then have to go in and put more around these areas making it look like a patchwork quilt. I've also heard people say that there are other products out there just as good as Dynamat, and some you can even buy in your local hardware store (I think it was called "brown bread"?). Anyway, just trying to figure out the best solution to my problem, and trying to wrap my head around the theory of how Dynamat (or any similar solutions) actually does what it does. Thanks! [/QUOTE]
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