Experiment question about sound treatment project


I'm considering making a few sound absorbing panels for my space.

To avoid the trouble of making the panels and finding out they don't help, could I simply hang pieces of the inner absorbent material to test out possible pact? If they work, I'll finish them, if not, labor saved.

Thoughts?
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@rix Nice photos and system. Interesting solution. Question: does the frame vibrate and does the fact that the rug doesn't go all the way behind each speaker matter?
Hmm, I would imagine that the frame material in rixthetricks system would cost as much as several finished panels from acoustimac which I have used in my room.

@goose Agreed, but he seems to have access to materials. I am not going to do things that way but it's interesting to see the concept he's deploying.