Office partitions as sound panels

Good suggestion. Thicker is better.

Elizabeth - I don't think that is true, because:

1) You can go to the manufacturer's page and view tables of the amount of absorption per frequency over a range of frequencies

2) The limitations of absorption pattern will not be any different for commercial products that are made of the same fiberglass

That said, I agree that the compressed fiberglass panels do have a sonic signature, and they do not absorb evenly across the whole spectrum. Do you have other suggestions for better absorption patterns?

If they cost $3500 each they are perfect for it.

I'm building twelve 4x8 panels using 2" rigid Johns Manville 817 panels:

http://www.jm.com/insulation/performance_materials/products/ci9_800series_spin-glas.pdf

Look at the table showing sound absorption coefficient at 125Hz for 1" and 2" thickness. You can see that 1" panel is useless at lower frequencies in spite of 817 material being twice dense (and 2x more expensive) than standard 814 (more common). Ideal would be the panel made of two 817s (without backing) - total 4" in thickness but unfortunately there is also WAF.

Corning also sells this stuff and is more common in some areas.