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WinFlag forum
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Subject Suggestion for modeling a textile
Date
Tue Sep 23 2003 19:02
Author Anders Buen
(anb@bs-akustikk.no)
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The manual and program looks very intuitive and good with references for the models and so on. I think this program is an useful tool for acoustics consultants and even producers of absorberes.
Now I wonder how to model a textile in a proper manner. In the room acoustical model ODEON one may set a tranmission index in addition to the absorption factor for a material. Scenery and variable absorption is often textiles or textiles with plastic or latex backing (like Ecovelour).
As the transmission index for "the first hit" may be calculated in WinFlag, I wonder if there is a suggestion for how to model a textile at least in principle.
The limp mass with a proper surface mass may be given a flow resistance different from 0. Is this a proper way to model a textile?
Or, e.g. a Porus model (like Mechel) may work as a "textile" if made thin enough, but then the sound insulation becomes very low.
Maybe a combination would be the more correct?
What would be your recommendation be for modeling a textile with a surface density of about 0.6kg/m2 and made up of wowen woull or like "Filt"
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