DIY Broadband Absorber - pictures posted

[Ethan Winer]

Originally Posted by ollicollins

should i remove back panels so they are just rockwool in frames?????

Yes. If they weren't spaced off the wall it wouldn't matter. But yours are spaced so there should not be a back.

--Ethan

[TheSweetener]

Originally Posted by airmate

now i made a measurement with fuzzmeasure.

i've recorded a sinus sweep through this chain:
brauner phantom c -> mogami 2791 -> chandler tg channel mk2 (eq not engaged) -> rme multiface @ 96 khz

the microphone was put in my listening position between the speakers.

i'll see if i can organize more accurate equipment for further measurements soon.

and this is it:

I think you should use a omni mic for that! The C stands for cardioid right?

[Lemonsqueezer]

Originally Posted by TheSweetener

I think you should use a omni mic for that! The C stands for cardioid right?

Yeah I think it is a Cardioid.

His graph looked very flat to me. Would be interesting to see what an omni would show with the same setup.

[Greg B]

Originally Posted by TanTan

i've never been more confused , this base traps issue is such a voodoo ...
i need to place bass traps on all my studio's corners and i just don't know which way to go , i'm looking for the best results and i can't make up my mind between:

- Ethan's Mondo\Mini traps
- DIY - bass traps
- DIY - super chunk bass traps
- Auralex LENRDS
- RPG modex \ corner modex

what would you do ???

Ethan's Mondotraps will be more effective in the corners than the Minitraps (but they also cost more). I have two Mondotraps and 4 Minitraps, along with some RPG Abflectors, Variscreens, and Skylines. Too lazy/busy to try and make them myself.

[bwo]

Here's a few I've made. They don't perform as well in the bassregion like my GIK 244 absorbers do, but they look much better.

[amørph]

I haven't read all the thread yet, but for those interested in free room measurement software, there is PureMeasurement from the IHA. It is based on PureData and will work on Windows, Mac OS X & Linux.

[Greg B]

Originally Posted by bwo

Here's a few I've made. They don't perform as well in the bassregion like my GIK 244 absorbers do, but they look much better.

Those are pretty cool looking. I've been thinking about making some similar to that for our home-theater room. Since it's also a living room, I want the bass traps to look more like wall art.

[slimboyfat]

hi, i read all the posts from this thread and it was somewhat enlightening cause I only roughly now about room acoustics,
but some variations came to my head. Would they work?

If I cut rockwool into triangles and pile them on top of each other, then cover them with let's say cotton, would they be good absorbers for the corners if i just stuck them in place? would they need to be tight against the wall? could I cover them with woodpanels and leave a space between the wool and the panels, would that improve the effect like with tuned absorbers?
As far as I have understood, the cornerabsorbation should not take to many high frequencies right? maybe wood panels with holes to let some sound through?

what about the shape of the room? couldn't you reshape the room like westlake&co., to optimize it(maybe wood construction plaster boards) and apply the absorbers on the outside to hide them, leaving some of the walls made of cloth(next to the speakers for instance?) i was thinking that it might not make such a big price difference and if you use the right measures(maybe size of rockwool slates) it can be done within 4-5 days.. this could even make flush mounting possible( I'm not quite sure cause flush mounting might need more solid walls..)

oh boy, I'm just guessing here.. anyone with answers for my knotted brain?