Anyone who's doing acoustics work should read this

[John_C]

http://www.bobgolds.com/AbsorptionCoefficients.htm

There are a lot of interesting results in there. For example Owens Corning 703 at 4" thick actually provides better bass absorption when it's straight on the wall instead of with a 16" gap!

also, take a look here http://www.bbc.co.uk/rd/pubs/index.shtml
I'm gonna trawl through the articles at some point and find the best stuff, but it'll take a while

gold:
http://downloads.bbc.co.uk/rd/pubs/reports/1992-10.pdf
http://downloads.bbc.co.uk/rd/pubs/reports/1992-11.pdf

and for something really comprehensive and huge http://downloads.bbc.co.uk/rd/pubs/...tural-acoustics/bbc_guideacousticpractice.pdf

 

[Boerboel666]

Too much information !:Spin:

I remember trying to make head or tail of this stuff last summer .

In the end I decided I needed RW4 rockwool for some bass trapping .

Ordered and paid for it online , RW5 rockwool turns up .......

Used it anyway seemed like the extra density would not alter my use for it much .

Although you need a working knowledge of 'the Force' to really understand

acoustics properly .

 

[colonel_claypoo]

been trying to follow the discussions over on gearslutz about these topics but it makes my head hyper-explode!
thanks for the links, though!

 

[Jarkko Mattheiszen]

and for something really comprehensive and huge http://downloads.bbc.co.uk/rd/pubs/...tural-acoustics/bbc_guideacousticpractice.pdf

A HUGE +1 to this. Don't be afraid of the size of the document. Read a couple of pages every now and then and you're bound to learn something new. Excellent read, and absolutely a must for anyone who's considering building a studio.

 

[Genius Gone Insane]

http://www.bobgolds.com/AbsorptionCoefficients.htm

There are a lot of interesting results in there. For example Owens Corning 703 at 4" thick actually provides better bass absorption when it's straight on the wall instead of with a 16" gap!

That is very interesting. However this is the only time I've heard of such a thing so I'm not buying just yet.

 

[lolzgreg]

Everything I bought was Roxul Safe 'n' Sound 4" which has the best overall LF absorption... EPIC FUCKING WIN!

 

[FloridaRolf]

http://www.bobgolds.com/AbsorptionCoefficients.htm

Does anyone here have a similar chart for stuff that is available in Germany / Europe?

 

[John_C]

there's actually some european stuff in there, rockwool for example is commonly available in the EU.

Also, it's probably not worth comparing co-efficients from one make to another, there's no way of knowing how consistent the test setups are.

 

[AudioGeekZine]

I bet some of you are wondering how something could have an absorption coefficient greater than 1.

scroll all the way down on the Bobgolds page and there are a million relevant links.