I'm building a SASS array to Rob Danielson's design
(https://pantherfile.uwm.edu/type/www/audio-reports/BoundaryMicExperiments/images/PBB2N-Plans_SASS-LikeDimensionsSept2010.gif),
and I have some questions about the foam used for the nose (baffle?)
The plans say to use high-density open-celled foam, and I don't know how to
identify the stuff. I rang the local supplier (Clark Rubber, which Australians
would know), and they said they can cut a piece for a few dollars. But when I
mentioned what it was for, they said it would be better to use acoustic foam,
which doesn't cost much more.
They said it's similar, but denser. It also comes in thinner sheets, so I'd
have to glue two pieces together.
Will it be better. Does it even matter?
If the aim of the foam is to block sound from the other side, why open cell?
Does it work better for that?
Sorry if these are basic questions, I don't know anything about foams, their
acoustic properties, and how this array works.
Peter Shute
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
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