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<blockquote data-quote="FoxPro5" data-source="post: 4363099" data-attributes="member: 562649">Yes I did. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifDefine &quot;deadening.&quot;The purpose of any foam in a composite barrier like LL is to float the barrier away from the surface, not really to absorb noise.Open cell foam is a broad band absorber that works better AWAY from the noise source. In home studios and such, OCF is shown to be more absorptive toward the center of the room. If you take something like LL with OCF and place it RIGHT NEXT to the noise source, how well will it function as an absorber?? Thus my comment of it not working very well. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifClosed cell foam offers some block-ablility (defraction), but not much. Mass Law governs block-ability. &quot;How massive is the CCF&quot;, should be the primary question. If the answer is &quot;not massive at all&quot; then you have a poor barrier and a poor absorber. Best bet is diffusion. Difussion is not refraction nor is it absorption.As a general rule:CCF for thermal apps. Great heat container/blockerOCF for absorbtion. Use away from the noise source where the particle velocity is highest.Barrier composites as close to the noise source as possible.</blockquote>

[QUOTE="FoxPro5, post: 4363099, member: 562649"] Yes I did. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] Define "deadening." The purpose of any foam in a composite barrier like LL is to float the barrier away from the surface, not really to absorb noise. Open cell foam is a broad band absorber that works better AWAY from the noise source. In home studios and such, OCF is shown to be more absorptive toward the center of the room. If you take something like LL with OCF and place it RIGHT NEXT to the noise source, how well will it function as an absorber?? Thus my comment of it not working very well. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] Closed cell foam offers some block-ablility (defraction), but not much. Mass Law governs block-ability. "How massive is the CCF", should be the primary question. If the answer is "not massive at all" then you have a poor barrier and a poor absorber. Best bet is diffusion. Difussion is not refraction nor is it absorption. As a general rule: CCF for thermal apps. Great heat container/blocker OCF for absorbtion. Use away from the noise source where the particle velocity is highest. Barrier composites as close to the noise source as possible. [/QUOTE]

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