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[Jack Schitt]

I have been having a friendly debate with a friend of mine over the use of foam vs more rigid materials. The debate is in the context of treating small bedroom type project rooms, with cost and space considerations being important factors.

The argument against is that foam will soak up too much high and mid freq content leaving the room boomy. My view has been that mass and position are the more important consideration.

Opinions?

[franman]

Dan,

THe classic mistake with foam (or any other thin porous absorption) is using too much of it and deadening all the HF and midrange without addressing any LF thus making a muddy sounding room, as you say. So, limp mass traps like membrane absorbers, can be used and some folks like to cover the membrane with a thin porous treatments to soak up top end as well. You just have to be aware and take care to address not just the top end and midrange, but the LF as well.... Nothing wrong with foam, or other thin porous treatments, as long as they are not used a panacea and the LF is considered as well.