I have been interested in making some quadratic residue diffusers (QRD) to the BBC spec for some time but never got around to doing it. The concept is back on my list.
Here is a document by the BBC that explains the concepts.
BBC Modular Acoustic Diffuser PDF
I was reminded of the concept when I saw these videos showing some in the background made with 4″x 4″ timber.
Hendrix Drum demo with Johnny Rabb – Part 1
Hendrix Drum demo with Johnny Rabb – Part 2
Hendrix Drum demo with Johnny Rabb – Part 3
Here is an article about making your own via TapeOp magazine:
tapeop.com – DIY Diffusors
PME Records – Diffusor
