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Old 18th February 2008
Lives for gear
esaias's Avatar

Could someone help out interpreting material's gas flow properties

in other words, what does this mean and how does it relate to acoustical/absortion properties (and compared to for example ever so popular OC703). For example here is airflow resistivity properties of PAROC COS 5
( Pääsivu )

45 10^-6 m^2/sPa

What does these figures actually mean?

This material was named by Paroc representative when I asked about rigid wool/fiber slabs which had density around 40-50 kg / m^2 although the guy could not give any ideas how the material works in acoustical sense.

I'm just looking for cheaper options than real acoustic rigid wool/fiber which is very expensive. I was thinking of putting these inside larger panels and use real acoustic (3,5cm think with fibreglass cloth) slabs, which I already have, as surfaces.

Thank you,

-Tomi H