I'm sure that everyone probably has seen this website before, but, just in case, here is a major source for acoustic data for just about every product on the market:

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

They have it all. . . and usually assuming some very different applications, as well (on the walls, with dead air spaces, etc.).

If this site is known to have bad data, I apologize for my ignorance. If it isn't commonly known and IS a source of good data, then I will have done my good deal for the day!

Sincerely,

Stephen Pruitt, Ph.D.

Nothing to apologize for here.

Bob is an excellent source of good data.

Rod