New room - flutter echo problem

Hi all. Apart from a few cloth frames and 2 doors, my tracking room is about finished. Based upon simple clapping tests, it appears that the room has significant flutter echo. Ringing seems to be toward the ceiling. What treatments best deal with flutter echo? Diffusers??? Cloth covered 703 or 705??? My control room does not have this problem. Same floor but ceiling is a bit lower. Thanks Geoff

Aloha, Very nice room/job! :D Perhaps a few clouds to temper some of floor/ceiling flutter to begin with? Aloha 8)

Geoff, I cant help you with your problems, but I just wanted to say thats an absolutely beautiful room!! Im really envious of the size, I bet It'll be a pleasure to work in once its all finished. Oz

kendale wrote:

Aloha, Very nice room/job! :D Perhaps a few clouds to temper some of floor/ceiling flutter to begin with? Aloha 8)

Thanks for the thoughts and the pics. Geoff

Ozzy wrote:

Geoff, I cant help you with your problems, but I just wanted to say thats an absolutely beautiful room!! Im really envious of the size, I bet It'll be a pleasure to work in once its all finished. Oz

Thanks Oz. Geoff

has anone had success using glue on panels to address flutter echo? things like Sonopanels. I hate to lose to much ceiling height with hanging clouds. If I have to I will, of course. Thanks Geoff

Normally flutter is a relative easy matter to solve. Sorry, I saw wrong (thought for a moment Kendales pictures where your's also). You can use whatever absorptive panels. Mostly this flutter is relative high in freq. So relative thin absorption will do. But you also could hang bend panels (whatever) free from the ceiling, acting as diffusers. This keeps RT higher. If you use transparent panels (acrylic, polycarbonate or pvc) it even gives a cool look, and visibly won't alter the volume and height from the room.

Eric - my room is the top picture, I have no ceiling treatments as yet. Floor to ceiling height is about 8'. Ceiling is painted double layer drywall hung on resilient channel. Geoff

Geoff, Posts crossed. I just noticed I was sleeping here, hence corrected my message. Sorry ......

Eric_Desart wrote:

Normally flutter is a relative easy matter to solve. Sorry, I saw wrong (thought for a moment Kendales pictures where your's also). You can use whatever absorptive panels. Mostly this flutter is relative high in freq. So relative thin absorption will do. But you also could hang bend panels (whatever) free from the ceiling, acting as diffusers. This keeps RT higher. If you use transparent panels (acrylic, polycarbonate or pvc) it even gives a cool look, and visibly won't alter the volume and height from the room.

Eric: Excuse my ignorance, but what are bend panels, and I can't visulalize acrylic or pvc panels??? Geoff

Sometimes people refer to polys (bend panels). The idea is is to scatter the sound. Here is a low quality picture of such diffusers I used this year for a tracking room. On the ceiling I used them twice (surface) as large. You do NOT need to use the absorption behind them on the ceiling. The use of that absorption depends on how they are mounted. It's there to prevent resonances between wall and diffuser. Note that these are hollow to the wall side (focusses sound). This are transparent panels, but that can as well be plywood or whatever other type of stable panel. I've used this principle a lot already.

Eric_Desart wrote:

Sometimes people refer to polys (bend panels). The idea is is to scatter the sound. Here is a low quality picture of such diffusers I used this year for a tracking room.

External image, not preserved — original: http://img131.imageshack.us/img131/6173/eddesigndiffusersie7.jpg

On the ceiling I used them twice (surface) as large. You do NOT need to use the absorption behind them on the ceiling. The use of that absorption depends on how they are mounted. It's there to prevent resonances between wall and diffuser. Note that these are hollow to the wall side (focusses sound). This are transparent panels, but that can as well be plywood or whatever other type of stable panel. I've used this principle a lot already.

Wow those are pretty cool looking. Did you make them or purchase them already constructed?? Geoff

Can anyone report on effectiveness of auralex space couplers as diffusers? Geoff

:twisted: You may guess 2 times. :) Wasn't my name and © not explicit enough on the picture??? You can copy them for strict personal use. 1) Take a panel with the right bending stiffness and mass. This can be whatever (wood, special stuff, plastic). Testing a bit. It should weigh > 5 kg/m2. These ones are > 8 kg/m2. 2) Soften the edges and corners (or round corners somewhat). 3) Buy chain, eye bolts and washers. 4) Drill 4 holes. Shampher these holes on both sides (if using breakable material). 5) Use from these bands they use to fix loads on trucks (handle Ratchet Straps) http://www.americanmovingsupplies.com/i ... 25x105.jpg 6) Span them in any shape desired (and possible of course). DO NOT OVER-SPAN THEM, because that's dangerous, not for the straps (they are more than strong enough), but not to break that panel which can have ugly effects). 7) fix chains on eye bolts. The safest are closed welded eye bolts and from this closable hooks. But the choice all depends on wire thickness and tension you put on it, which in it's turn depends on the thickness and material/bending stiffness of the panels. In this version the chains are spanned diagonal to deform the panels in all directions and asymmetric. You can also use the chains parallel. You can also use thin steel cable with special spanners. There are several options possible. Check your material and test it in how far you can safely bend it. This year, for the first time I did a stupid thing and over-bend one of them. It broke, during absence of people, but it was as an explosion (dangerous). This was my fault. Just making one I still needed with a left over from a non-adjusted thickness versus radius.

Sorry. I couldn't tell whether your name was on the pics because of rights in the product or rights in the pics themselves. Geoff