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Acoustic hanger thickness?
Posted: Thu Apr 10, 2003 1:18 am
by jazzman
I'm not sure I've got this right. I've read that your acoustic hangers are 18 mm, i.e. 3/4 inches thick, but also that they're 3/8" thick. Is the thickness dependent on the overall size? What works best for what kind of frequencies?
And what kind of insulation can you wrap around it and how thick should that be?
By "fiberboard" do you mean what's called Masonite in the US, that is, the stuff they make pegboard from?
Thanks for clearing this up.
Lee
Posted: Thu Apr 10, 2003 7:19 am
by John Sayers
No it's not masonite - it's called cellotex I think in the US. It's normally 1/2" thick and is a soft fiberboard. The insulation is normally just standard fibreglass batt.
cheers
john
Posted: Thu Apr 10, 2003 8:14 am
by jazzman
Celotex makes a lot of acoustical ceiling panels:
http://www.us.bpb-na.com/ceiling/celotex.html
Do you possibly mean something like Homasote?
http://www.homasote.com
"Sound deadening, insulating, tackable, structural, environmentally friendly building materials from recycled post-consumer waste paper."
or Homasote 440 Sound Barrier?
http://www.homasote.com/sb.html
Lee
insulation thickness....
Posted: Thu Apr 10, 2003 12:44 pm
by krish
what about the insulation thickness it should be 25.....50 or 75 mm?
Posted: Thu Apr 10, 2003 9:03 pm
by jazzman
The thinnest insulation batts available here in the US are 3 inches (75 mm). This design of John's
http://www.johnlsayers.com/Studio/PDF%2 ... r_Wall.pdf
shows spacing of 200 mm between hangers, which would nicely allow for 3 inches of batting on either side, plus a little air.