[jules]

Hi all,

I'm looking for figures that relate the sound absorption properties of various materials with frequency. The best expression of this would be as a graph with db attenuation on one axis and frequency on the other. I guess mass and other factors come into it but basically those should be the constants.

Any thoughts on where I might look?     

jules 

[poseidonsvoice]

If you don't get any productive responses here, I would look in the Acoustics Circle.

Best,
Anand.

[jules]

Thanks Anand, perhaps I should say that this isn't a room treatment question and I've done some searching but frequency and hard figures are what I'm after.

jules

[*Scotty*]

Here are some links from a GOOGLEsearch on your subject of inquiry.
http://www.saecollege.de/reference_material/pages/Coefficient%20Chart.htm
http://www.bobgolds.com/AbsorptionCoefficients.htm
http://www.engineeringtoolbox.com/accoustic-sound-absorption-d_68.html
Scotty

[jules]

Thanks Scotty, the bobgold site particularly, is brilliant and loaded with good figures.

jules