J.F.Oros wrote: - in a 2 leaf window or wall, is it better to use equal thickness on the leafs, because the loss at the (equal) coincidence will not be the defining factor in the overall TL ?
(I know that the usual recommandation is to use different thicknesses ...)
Scott R. Foster wrote:"Nobody ever asks for proof or the why. "
Really... why not?
Bert made me ask that question.
PS: Eric - please email me - I have a question for you.
Scott R. Foster wrote:lemme know if you need any help... having you offline is a tragedy.
PS to Bert: Shame! Get yo ass over to Eric's and fix the man's computer... you know old people can't do that stuff by themselves.
Scott R. Foster wrote:Eric: Correct me if I am reading this wrong, but the bottom line is:
1) Always add mass, even if it means a narrower cavity; and
2) Use a differentiated mass load for the two sides only if it adds mass.. if differentiation means lowering the mass [taking a layer off] - don't do it.
3) But what about this situation... you desire a wall to provide TL of musical noise - and you can have a double studded wall with 25mm of gypsum each side [50mm total].. or a single stud wall with 50mm of gypsum each side [100mm total]. Which do you choose? In other words - does the step of decoupling the studs compensate for loss of mass at any stage of the decision tree - or is mass always defining?
Scott I should link to this thread (graphs) somewhere from within your FAQ.
Eric Desart wrote:Where did you get this 1.4 from? Are their documents you can refer too?
Eric Desart wrote:Flaviu,
Does this 1.4 comes from an empirical approach by you studying all those IRC and other measurements, or is this mentioned in this JASA article you referred sometimes (or other document)?
If so can you repeat this exact reference?
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