A thousand audio uses for memory foam. Or maybe just one . . .

So i have this old memory foam topper for my bed, and before I cast it off completely, the DIY part of me I got to thinking, could it be used for acoustics in any way? I don’t have the slightest clue as to the frequency it would be good at, but cutting it into various rectangular shapes and sizes first comes to mind. I could glue them to some plywood and diffract and/or diffuse sound. 

Any other thoughts or suggestions?