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Author Topic: Tuning my control room  (Read 3698 times)

Mike Troolines

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Tuning my control room
« on: February 10, 2007, 12:59:15 am »

Hi guys,
Thanks for all the great information on the forum. If you guys can help me decide on what would be most efficient in treating my room further it would be greatly appreciated.

First here is a pic of my room so you can see what I have done so far.index.php/fa/4272/0/
All the broadband absorbers and cloud array are 3lb. 2" rigid fiberglass. The wood panels are 1/4 birch with R19 behind them. Directly across from the window is a birch panels of the same size angled about 5degrees towards the rear of the room.
There is a bit of a flutter echo that I need to deal with above the window for sure. But at the same time there is some lowend peeks and valleys that i need to deal with, as you will see in my frequency measurments.
Thanks in Advance

Mike Troolines

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Re: Tuning my control room
« Reply #1 on: February 10, 2007, 01:05:14 am »

index.php/fa/4274/0/

Mike Troolines

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Re: Tuning my control room
« Reply #2 on: February 10, 2007, 01:09:03 am »

Oh yeah room dimensions are roughly: 17'1" X 14'9" x 10'10".

Mike Troolines

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Re: Tuning my control room
« Reply #3 on: February 10, 2007, 01:48:52 am »

And yet another thing. The waterfall plot.index.php/fa/4275/0/

Tom C

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Re: Tuning my control room
« Reply #4 on: February 10, 2007, 06:49:03 am »

Lava lamps. They're completely missing.
No room that size can sound good without a set of lava lamps.
No kidding!

































.

















Okay, I was kidding.
You don't need a set, one lava lamp works just fine.

I'm right now building 2 wall absorbers right to the left/right
of the place where I'm sitting (that would be where your window
is located).

From the placement of my speakers there SHOULD be no reflexion
from there, but some quick tests showed that it improves the
acoustics.

And when you're there anyway the wall/ceiling corner above the
window has some place for absorbers, too.
Some Ethan Winer entity writes that you can't have enough of
them.
Strange guy Wink

I'd adjust the absorber's thickness according to your 150 Hz peak.

Tom





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Ethan Winer

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Re: Tuning my control room
« Reply #5 on: February 12, 2007, 03:35:55 pm »

Mike,

> All the broadband absorbers and cloud array are 3lb. 2" rigid fiberglass. <

I agree with Tom that you need much thicker absorption, at least to improve the low end. Two inches thick flat on the walls is enough for flutter echo, but thicker is always better there too because it gives that much more bass trapping which is always welcome.

--Ethan

Tom C

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Re: Tuning my control room
« Reply #6 on: February 12, 2007, 04:46:53 pm »

Ethan Winer wrote on Mon, 12 February 2007 21:35

Mike,

> All the broadband absorbers and cloud array are 3lb. 2" rigid fiberglass. <

I agree with Tom that you need much thicker absorption, at least to improve the low end. Two inches thick flat on the walls is enough for flutter echo, but thicker is always better there too because it gives that much more bass trapping which is always welcome.

--Ethan


Just do give you some figures: after a careful study of the
coefficients of the mineral wool available over here I built
corner traps 22" depth for the front corners and the back wall
is covered with 24" traps + 4" air gap.

Of course not everyone has a room big enough for that (and for
that reason the side walls will get only 4", the ceiling 4" + 2"
gap) but you get an idea. Thicker is better.

When I've finished all the trapping I'll probably add some
diffusers, but that must wait until I know my room again.

Tom



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Mike Troolines

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Re: Tuning my control room
« Reply #7 on: February 14, 2007, 12:09:45 pm »

Cool so I'll add another layer of 2" everywhere I can(theres a 4" gap behind all of the broad band absorbers) and turn my controll room window into a big lava lamp. Very Happy

The wood panels towards the back of the room are 1/4 birch backed with r19. The top of them are open air. Should I maybe drill holes(maybe 1/2" or 1") in the face of them to alow them to absorb more low end.
There is also a panel identical to those directly accros from the big window. It is angled towards the back of the room by 5 degrees.
Do you think drilling holes in this would be worth the absorbsion, as it would take away from my left to right symmetry.
Sorry for the long windedness.
Thanks,
Mike

Ethan Winer

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Re: Tuning my control room
« Reply #8 on: February 14, 2007, 03:34:03 pm »

Mike,

> Do you think drilling holes in this would be worth the absorbsion, as it would take away from my left to right symmetry. <

I can't really see this in the photo above, so I can't say for sure. But 1/4 inch plywood is pretty thin, so it's probably passing some amount of bass through to the other side already.

--Ethan

franman

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Re: Tuning my control room
« Reply #9 on: February 14, 2007, 09:24:04 pm »

The 1/4" Panels may act as membrane absorbers, but typically this is in a sealed volume. The tuning is determined by the mass of the membrane (1/4" Birch Ply) and the airspace... Formula is available in Master Handbook of Acoustics (or my brain when it's working better.. just finished shoveling ice/snow for 1 1/2 hours!!)...

With open air tops, they won't work anywhere near as efficiently but there will still be some panel action....

Increase your broadband trap thickness... big time...we do 2-3 sometimes 4' feet in tall ceiling rooms!!
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Mike Troolines

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Re: Tuning my control room
« Reply #10 on: February 18, 2007, 09:37:00 pm »

Thanks guys. I appreciate it.
Mike
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