Was going through some old pictures and found a diffuser design that I never got to complete past the first prototype.



I have decided to post them here where they might inspire someone.  While these are calculated for small cardboard tubes, it could easily be scaled up for larger tubes.

In this design each well has it's own divider vain (the walls of the tube) and instead of setting the face flush and creating varied well depths I choose to make each tube the actual length and flip it upside-down for simplicity.  

On scaled versions with say 1.5 inch ~ 2.0 inch tubes I would likely experiment with fiber-fill in the tubes.

So, that's your seed... let me know if anything grows!

-Steve

You can see in this rendering where I put the light straight on that even the light is diffused as a perfect hemisphere. I'm sure it will treat high frequencies the same way.

I remember us talking about those - in fact, just last year I was already revisiting that idea, and shopping for 2" PVC square tube. I know they make it, but nobody makes it inexpensively. I can actually get steel square tube for less!!

Maybe I'll try the round tube, though I feel there will be a a bunch more absorption due to the round shape of the diffusers, they should however diffuse quite well.

i'm happy to demo these in my basement if someone wants to build one!

If they were a bit longer, and they'd need to be 1" ID.  That's a great find to experiment with some wall art though.

Well, the square tubes are a bust. I can't find them in any quantity at a decent price.

I'm casually running the numbers on round tube to see what I can do with $100 in materials.