Acoustic Treatment, is my room "difficult"?!

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Farno

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That's my room (note that my GoPro camera causes a fish-eye effect, the room isn't that big). I think it's about 25+ feet long (from window to door).

Now I have this really bad bass problem I've always gotten and now I'm finally going to fix it. I also want to make this room acoustically accurate. This is for mixing purposes only, I'm not micing anything but that could change.

I know my monitors (Alesis M1Active USB) are junk and are contributing to the excessive bass at certain frequencies so a pair of HS80-M's are coming!

Now this room is weird with the ceiling being angled so I don't know if this requires any additional work. Also the rear walls (facing the door) are different distances to the monitors. I plan to make all the bass traps and absorbers/deflectors or whatever myself.

What kind of material do I need to get (fiberglass, moving pads?). I can get moving pads free but not sure how well they would work. Would insulation work? I'd like to keep this as cheap as possible, but I also want to do it right (I know it's not going to be professional if I'm on a budget).

If I clap my hands in the room, there is no reverb or echo that I can hear so it seems that it's fairly good as is (probably not due to my inexperience in this).

Monitor placement can be changed (I say this cause I believe they're to far apart). I can actually change the whole room around if it's for the better. Some feedback on where I should put monitors would be nice!

So I want all the advice I can get on this! I'm still trying to educate myself on all this different foam/fiberglass and positioning. It's quite a lot to understand!

Thanks a lot!
 
That looks like a great room to trap out. Look up "703" and "super chunks" and "bass traps" and read Ethan's stuff at Realtraps. Take yer time thinking and learning the concepts before you spend the money. Decide how you want to proceed, whether bought and installed or DIY. How's yer budget? You almost can't overdo room treatment and every addition sounds better so you don't have to do it all at once - just start in the right places and go from there.


lou
 
Is 703 as effective as we've been led to believe? I've heard that it reflects almost as much as it absorbs.
 
diggy_dude said:
Is 703 as effective as we've been led to believe? I've heard that it reflects almost as much as it absorbs.
Click to expand...

I think you've heard wrong. I can already tell a difference just with the corners done. My clap and shout test ain't all that scientific but the ringing is way down.

Read moar. ;)


lou
 
diggy_dude said:
Is 703 as effective as we've been led to believe? I've heard that it reflects almost as much as it absorbs.
Click to expand...

Interesting. Can you elaborate some there?
I notice too though Nathan's traps for example offer a mid-high reflective side specifically to provide the option not over dampen the whole room.
 
Alright... I'm planning it out here.

I plan to build some corner bass traps, but how would I do the middle corners (not above the window). The angled ceiling I think is 45 degrees (not sure of the roof slope). Unless their is a better way to do it, I would need to make an incredibly technical triangle to fit above the bass trap which would go up to the middle wall.

Here's a pic of what I mean:

Triangle.jpg


That's a 34" Cut Pattern according to this:

file.php


Do I need to go 34" or should I just do 24". Is it that big of a difference?
 
Budget rules here - how much ya' got? Superchunks are expensive, they use a lot of material. I went with the 24" size - squares instead of triangles - and it ate 6 sheets per corner. If you are going 34" face double it. Even bought cheap that's $75 per corner! You could start with 2'x4'x4" panels straddling the corners. When you have more budget those can go anywhere and you can do the superchunks.

Specific to your question: Fill the corner to the junction and then trim the pieces as you go. An electric carving knife is an excellent tool for cutting 703. I bought one special for the job - $8.99 at Ace Hardware.:D

The tricky part of that corner will be making the fabric covering look good.


lou
 
Ok I have another question! Would building a partition wall across the room to the wall with the water cooler in the corner help or hurt? It would make the room smaller but it wouldn't be as oddly shaped. The dimensions would be 15' 3" long and 11' 6" wide. This would also help with soundproofing from the main part of our house since this is above a garage.

I still have to get some OC703. I found a place that sells it, gonna get some soon.
 
It might help with isolation but I think it would make the basic room treatment more difficult. I think a little asymmetry behind the mix position is a good thing maybe. Breaks up the returns. (Check with the experts - that's just a gut feel.)

How important is isolation?


lou
 
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