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Old 11th March 2008
Lives for gear
Hannes_F's Avatar

Originally Posted by NLP View Post
So, just air without mineral wool is even better
50 m air with just a cloth over it could be an interesting test and should be amazingly good indeed according to the ZORBA software. heh

Or, to put it even more to an extreme, use a tent outside. I have heard this is not a bad alternative for some projects.

Actually 'heavier is always better' is not true but 'lighter is always better' is also not true. What should be true is this: For every given absorber thickness and air gap combination there is an optimal flow resistance.