Re: Foam for SASS

["Peter Shute" pshute2]

That makes sense now, thanks for that.=0D
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What do you mean by "edge on"? Do you mean the join should be visible in th=
e direction the sound comes from? Why's that? Does the glued joint reflect =
sound because the cells are clogged?=0D
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Peter Shute=0D
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Sent using BlackBerry=0D
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To: =0D
Sent: Tue Feb 28 03:11:44 2012=0D
Subject: Re: [Nature Recordists] Foam for SASS=0D
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> The plans say to use high-density open-celled foam, and I don't know=0D
> how to identify the stuff.=0D
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Peter,=0D
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You can't blow through closed cell foam. Sound will reflect off it as=0D
if it was a plastic surface. You don't want that. You can blow through=0D
open cell foam which can vary in density. The more open type is used=0D
in windshields. More dense open cell foam absorbs sound and this is=0D
what is called for.=0D
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Have a listen by holding various bath sponges to your ear.=0D
Commercially what you want is higher density sound absorbing open cell=0D
foam (more resistant to being blown through), but if you stick=0D
together several layers, make them edge on. Test samples by listening=0D
to them.=0D
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David=0D
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David Brinicombe=0D
North Devon, UK=0D
Cogito cogito ergo cogito sum - Ambrose Bierce=0D
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