Aside from the discussion of the possible(or not) toxicity of PVC and MDF, No one have ever talked about the main question: Have anyone searched into PVC panel resonance? Where can I get this phenolic resin board???? My plan is to use it to build the baffle for my OB system...
plenty of loudspeaker cabinet wall damping discussion threads - I gave a post from Geddes on the material he uses in his OS waveguide speakers
Even water is toxic. In the USA several people have died during competitions to see who can drink the most water in a certain period (e.g. radio station "fun" contest). Don't believe it? Read all about it:
Woman in water-drinking contest dies - US news - Life | NBC News
Not just for "fun" in the USA, either:
12-Year-Old Dies From Drinking Too Much Water | The Stir
Thermoplasts have some excellent acoustic properties. We've all seen turntable plinths made of acrylic. Unfortunately, for flat PVC panels, rigidity isn't one of those properties. At least, not flat.
cut your pvc at home......😀
Toxicity of vinyl chloride and poly(vinyl chloride): a critical review. - PubMed - NCBI
Toxicity of vinyl chloride and poly(vinyl chloride): a critical review. - PubMed - NCBI
Attachments
Please don't be so toxic... First carefully read the paper, than panic...
From the Summary of the abovementioned paper:
" epidemiological studies have shown a high concordance for the carcinogenicity of vinyl chloride...
Both experimental and epidemiological data indicate that PVC dust is probably associated with respiratory effects, both neoplastic and nonneoplastic in nature."
So, no evidence for PVC to be harmful at all, only indication that PVC dust probably is associated with respiratory effects. All suspicion patients worked in PVC factory, or lived in the immediate neighborhood to the PVC factory, with orders of magnitude higher concentrations of vinyl chloride or PVC dust than in average home.
That paper is from 1983, by a "Consulting Epidemiologist"...
Anything to support his claims in the last 33 years?
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I've used Acrylic successfully for OB front at 20mm thickness, and the forerunner to mine were fully-acrylic OB's with 15mm thickness by James Doddington in the UK . It definitely seems to beat birch ply, chipboard and MDF in this application, so it would be fun to see an enclosure using some or all acrylic, although stuffing it would look pretty ugly !
Something stirs in the Undergrowth - Page 98 - audio-talk
As I guide to cost I had two panels of 1m x 0.5m cut, each with two speaker cut-outs CNC machined, for a total of £230 including shipping.
Something stirs in the Undergrowth - Page 98 - audio-talk
As I guide to cost I had two panels of 1m x 0.5m cut, each with two speaker cut-outs CNC machined, for a total of £230 including shipping.
Hi pink too bad that your great work go slowing ...😉
not green btw and not so safety....
https://www.google.it/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwj57IOjxOrLAhWKF5oKHYZiBwwQFggiMAA&url=http%3A%2F%2Fwww.who.int%2Fipcs%2Fpublications%2Fcicad%2Fen%2Fcicad04.pdf&usg=AFQjCNFlL3DDSD2AYbBTe6ofv8U3NlQDew&sig2=6seoZnSp5od9d_cmvi-q5w
not green btw and not so safety....
https://www.google.it/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwj57IOjxOrLAhWKF5oKHYZiBwwQFggiMAA&url=http%3A%2F%2Fwww.who.int%2Fipcs%2Fpublications%2Fcicad%2Fen%2Fcicad04.pdf&usg=AFQjCNFlL3DDSD2AYbBTe6ofv8U3NlQDew&sig2=6seoZnSp5od9d_cmvi-q5w
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