Weasel9992
New member
Not a bit Jeff...that's exactly what I have in my gobos. One side is poly diffusion and the other is covered with Guilford of Maine black fabric. They are so useful it's not even funny.
Frank
New Mix Position Cloud or Back Wall Absorption?
- Thread starter Jeff_D
- Start date
Not a bit Jeff...that's exactly what I have in my gobos. One side is poly diffusion and the other is covered with Guilford of Maine black fabric. They are so useful it's not even funny.
Frank
Jeff_D
New member
Cool. So, is there any magic to the radius of that arch?
I think I'll do the cloud this weekend, then order another box of 703 on next months budget.
Weasel9992
New member
Eh...kinda. Too flat and they act more like a wall. Too much arch and they start to cause audible pinging and increased lobing when lined up on a surface. Mine are 2'x2' with a maximum arc of 5" (measured from the center of the base). Someone better at trig will have to calculated the radius.
Frank
RICK FITZPATRICK
New member
All pro studios have gobos with one side reflective, and the other absorption. Some also have one side as a Slot resonator. Which is kind of a Hemholtz resonator
Well, read this if you REALLY want to get confused.
http://forum.studiotips.com/viewtopic.php?f=1&t=3533
pandamonk
Well-known member
That's really got me thinking and researching. I've found something called a diffractal QRD which seems interesting:Well, read this if you REALLY want to get confused.
http://forum.studiotips.com/viewtopic.php?f=1&t=3533
scott free
...is not my real name.
Kinda like this! (I made some for the front half of my window plugs!
Scott.
Scott.
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pandamonk
Well-known member
Brilliant! How well do they work and how hard were they to build?Kinda like this! (I made some for the front half of my window plugs!
Scott.
scott free
...is not my real name.
Brilliant! How well do they work and how hard were they to build?
For me...piece of cake. They work great!
pandamonk
Well-known member
How did you make the mini QRDs?
scott free
...is not my real name.
I was working at a high-end cabinet shop, we got a job making QRD diffusers for a round church which had a very high ceiling. We milled the maple at the shop with our molding machine, the knives that cut the QRD profile were custom made. Because maple is a hard wood, each piece had to be run 3 times to get to the spec depth/profile. There was a bunch of scrap left over and I was able to take it. It's been in a tidy covered stack in the corner of my garage for about 3 years now.
Link to a manufacturer/supplier
http://www.kineticsnoise.com/interiors/hightones.html
Get all learned up!
Scott.
