I have been searching the Absorber Coefficient in Octaves Chart for spray polyurethane foam in thicknesses of 2, 6 and 8 inches(5.08, 15.24 and 20.32 centimeters respectively!) and found nothing. All I found is a chart for spray polyurethane, but the thickness is lower than I need to know.
I need this Chart (Absorption vs Frequency curve) in order to add to the ease acoustic simulation software material database for a better simulation in a study of acoustics in a very large room with this material applied inside the roof.
I am talking about the polyurethane with its auto skinning product(this was taken off, sanded and cut) with 45 to 55 Kg/m3 of density.
Where can I find this chart?