Quote:
Anyone know where I might find the data for this foam:
http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=300-895

Ethan?

Why not ask Parts Express? They might very well have on hand.

Quote:
Anyone know where I might find the data for this foam:

I agree with Doug, you should ask the seller. But...

This foam is very small so obviously you'll need a bunch of them to do much. This is one of the big problems with absorption coefficients in general - they don't take into account the size of the device. More to the point, look at how much of the foam is removed to make the pattern. It claims to be five inches thick, but the average thickness is half that. For mid and high frequencies that doesn't matter, but it sure does below a few hundred Hz.

--Ethan