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 Post subject: Re: Acoustic Treatment Help ?
PostPosted: Sat Oct 22, 2016 7:13 pm 
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will fuck for food
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I was told by a acoustic engineer that the trick with rockwool for basstraps is not stuffing the whole corner but leaving airgaps.

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 Post subject: Re: Acoustic Treatment Help ?
PostPosted: Sat Oct 22, 2016 8:01 pm 
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There is a much better paper on why rockwool doesn`t work for much below 200hz.

But this will do

Basically, science......

But essentially it is completely impractical to try to deal with sub 200 with rockwool unless it is a couple of feet thick and at least a quarter wavelength from the wall.
so 100hz = roughly 3 meters. Quarter that is 75cm from the wall at least. So a BIG chunk of rockwool sitting nearly a meter away from the wall to have even a basic effect on 100hz.
And so we begin to see the problem for small, project studios.

http://www.veoh.com/watch/v66341606a37ZnBwy


http://www.recordingreview.com/blog/rec ... dont-work/

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 Post subject: Re: Acoustic Treatment Help ?
PostPosted: Sat Oct 22, 2016 9:43 pm 
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Not to mention that the bigger the air gap is, the more self-oscillation occurs. There's definitely reason why acoustic treatment companies have more then just rockwool in their traps for bass absorbing.

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 Post subject: Re: Acoustic Treatment Help ?
PostPosted: Sat Oct 22, 2016 10:02 pm 
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Will do the reading Void! Nice stuff you bring up!

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 Post subject: Re: Acoustic Treatment Help ?
PostPosted: Mon Oct 09, 2017 8:57 pm 
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Bringing this thread up again as it seems to be the most general on acoustic treatment here, besides the one in the archive. So after reading and youtubing the whole weekend and this evening I realize that things seem to be way more complicated than I expected it to be. Like there seems not to be an overall good advise to follow and have a nice sounding room easily.

I know ask myself, and you fellas, where to start? I learned that I should stay away from foam, first focus on absoption rather than diffusion and think about professional bass traps like GIK offers. As GIK offers free advice and is located in MY TOWN, i guess i'll contact them and see what will happen.

Before contacting them I might rearrange my room first, as I'm firing down the narrow side instead of the long way yet. Could change it this way to fire the long way: put my desk in front of the window, so that there will be space in between where i might put my monitors on stands. I haven't found out if it's okay to have them on my desk or if it would be worth it to get stands.

One thing: should i get an omnidirectional mic for measurements or is it somehow conceivable to use my rode nt3? (I ask despite suspecting a big NO, not possible). Or will the advice from GIK be enough and I'll install what they tell me and that's that? I plan to move this winter, so maybe I gonna buy real basic stuff at first, that will be 100% usable in a new room. And after moving I'll see what I can add then. Like my budged now is about 500€.

Is this a plan, or have I missed something? Oh my, that's a lot of things to think of when trying to get my BEDROOM sounding better xD. I'll add a sketch of my room, wait...


...here you go:

Image

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Last edited by Root on Mon Oct 09, 2017 9:11 pm, edited 1 time in total.

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 Post subject: Re: Acoustic Treatment Help ?
PostPosted: Mon Oct 09, 2017 9:06 pm 
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Ok a quickie: Download REW and buy a cheap skate Behringer ECM8000 or similar and start measuring your room. Move your stuff around and keep measuring to see where the best result seem to be. You're looking at reverberation time and how well a smoothed out curve confirms to "flat"-ness (no room is ever truly flat but what is close enough). Look into acoustic panels. You'll always need a lot. Cover all first reflection points / back wall / front wall / corners / other areas of the room where issues might occur (test with filtered pink noise and walk around the room / do more measurements etc etc) and not necessarily in that order. It's tricky since you really gotta cover it all at the same time I guess. There are no real "best to start here" options.

You're right about diffusion, go the absorption route instead. Contact GIK since they're in your town for sure. I'm happy with their stuff and I spent about £9500 on it.

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 Post subject: Re: Acoustic Treatment Help ?
PostPosted: Mon Oct 09, 2017 9:43 pm 
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Great, thanks. Ordered Superlux ECM999 as it seems the same like the ECM8000 but nearly half the price. I'll go one small step after another and improve things a little from time to time and when I have the money. The only thing is that I for sure won't be able to pave my walls with acoustic panels, as I'm living in this room, too and it's my only room in a shared flat. So I'll maybe go for something like two acoustic panels and two basstraps and that's it for the beginning. Can't afford more and don't have the room. I'll see what GIK will tell me and then try and measure what setting will be the best..

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