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Contact Us
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Morset Sound Development
+47 73915000
Persauneveien 25
7045 Trondheim, Norway
contact@winmls.com
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WinFlag forum
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This forum has been retired and will no longer be monitored.
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Subject Reduction index of porous layers
Date
Wed Dec 8 2004 11:01
Author Tor Erik Vigran
(vigran@iet.ntnu.no)
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Do I understand you correctly when you want to include the actual mass of the porous layers in your calculations? Certainly, a porous layer will introduce a small mass loading on a connected plate and in WinFlag the modelling ignores this effect. I shall not advice you to use the limp mass layer to simulate the effect as one may overestimate it, i.e. I would compare with measured results before doing so. As for a real limp mass layer e.g. a plastic sheet, this should be placed where it is physically situated in the construction. Please report back if you have further quires.
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