Thanx again Eric
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Find it difficult to compare prices for you. That's more defined by local market situations.
Yes ! fully understandable, if a different about, 2.5 to 3 times, i think, at least it worth for a try !
Now i am looking at the Borchure they sent to me, The CSR & CBA seem very interesting to me ( i think u did read it ! right ! ). They claim that A CBA ( product using Basotect with metal sheet ) " with thickness of 25cm which in the frz. range from 30Hz upwards allows the maintenance of free accoustic field conditions even in relatively small rooms." Do u think it's possible ??
honestly don't quite understand what means " Free accoustic Field" in this situation !
But why on the DIN 52215 & DIN 52212 graph, they don't look very impressive, especially on the LOW (125Hz) side, may be i don't fully understand the DIN system or comparing in a wrong concept !
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Maybe you can find coton wool, ployester or polyether (as in matraces) foam?
Infect i did try! after i saw a foam corner trap made with ployester, claimed that it can go down to 45hz ( anyone try this ? ), badly it cost 3 to 4 times more if ship from England.
Anyway all i found locally were closed cell foam. many supplier even don't know their product are close or open cell. i sound like a idiot to talk with them (or may be i was),
So after all this disappointing search, i forced to use glassfiber together with my skin problems !
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From an acoustic point of view, Melamine is about as good as wool, say a little bit less good. It's acoustically certainly a valid alternative.
From the point of view of fire properties, within the foam world, it's the best alternative around.
Glad to know that !
thanx Eric !
i have to reset my english system inside my head for awhile and will come back to u and others great members here later ! Ciao !
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