I've been building some new acoustic treatments for my recording studio and
worked out a design for a 2D Quadratic Residue Diffuser (QRD) based on the prime
number 19, but had no idea what it would actually look like. So, I fired up
POV-Ray (a year-long hiatus) and after creating a simple 2d array of wood
lengths I was able to get this pretty decent visualization in no time.
The physical unit will be 2 x 4 feet and the math says it should diffuse
soundwaves from ~430Hz to ~5400 Hz, which is just what I need for the rear wall
of my control room. Now I just need to actually go out to the workshop to cut
and glue 700+ pieces of wood. Luckily the snow has been very light so far this
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