Room goes Boom

[fredk]

Subject says it all. I live in a concrete box (slab construction apartment) and the room is sparsely decorated, so I knew I was in for some trouble, but I am surprised that its more on the bottom end.

For most of the music it is noticable, but not bad. For a few tracks it is unbearable.

With my room layout, I only have two corners for traps, and one is already occupied so I have a challenge.

I will be back with pics and a layout once I get everything set up.

Fred

 

[MinusTheBear]

Are these the M80's you are setting up?

 

[fredk]

Yes they are.

 

[bpape]

Not sure how much aesthetic leeway you have, but don't forget the horizontal wall/ceiling corners and the rear wall behind the seating position to address low frequency issues.

Bryan

 

[fredk]

Thanks Bryan. The rear wall is a sliding balcony door. My only real option is the ceiling corners.

Layout:

Sorry for the small image. It posted larger on another board.

Fred

 

[bpape]

Understood. I think those are your best option. If you can, try to get some straddling the wall/ceiling intersection above the sliding door too since you're sitting so far back. That's likely a lot of the issue.

Bryan

 

[fredk]

I measured today and I only have 14" between the top of the balcony door and the seiling. I probably need another 4-6" for the curtains. That dosn't leave much room for corner traps.

From what I have read, most traps seem to be 2' across the diagonal.

Fred

 

[bpape]

They are. When straddling at 45 degrees, the back of the panel will hit each edge at approx 17" from the corner. Should still be able to get something up there - or get something custom sized to be a few inches narrower to fit.

Bryan

 

[nibhaz]

DIY Small Corner Trap

If you go the DIY route you could easily create a corner trap that has a 1'6" face and has a depth of 1' where it meets the wall.

You'll be sacrificing low end absorption, due to the fact that with such a small triangle of material only about 50% of surface area exposed to room will have a depth greater than 4 inches. This should still produce a solid broadband absorber capable of having some effect on the lower end. To maximize this limited effect you would want to make the absorber as long as possible. Say wall to wall

I've attached a file that shows the cuts on a 2x4 piece of material without producing any waste. The up side of using smaller triangles is that it requires fewer 2x4 panels per linear foot when constructing the absorber.

These links provide very useful ideas and concepts concerning this type of trap and could help you design something that fits your specific needs.

http://www.bobgolds.com/TrapHarder/home.htm

http://forum.studiotips.com/viewtopic.php?t=535

 

[fredk]

Thanks for the sketchup and the links nibhaz. I have an extra challenge because the only corners available to me are the front/ceiling and back/ceiling ones. I will need to make a ridgid frame to hold the fibre board and a way to hang it.

My landlord is gonna love me!