how to treat a ceiling?

  • Thread starter Thread starter dobro
  • Start date Start date
No interruption at all. As for 'cloud material', received wisdom here talks about using stiff fibreglass rather than foam, cuz for its weight and price, it absorbs better than foam. The stuff I buy here is 4'X8' and 2" thick. You could suspend sheets of it nine inches to a foot from you ceiling maybe, depending how much headroom you need. :)
 
@ dobro and anyone.........

Thats cool, I will definately consider doing the "cloud"........ You talked about treating the coners of the room as well. Does that help alot?

Another Q while we are on the subject. By reading a thread a while back, it was suggested to put some rubber feet things under my monitors to somewhat keep them from setting completely flat on my desk, which I did. But the other thing is I have ports in the back of the speaker that face the wall. It was suggested to me to have the monitors at least 6 inches from the wall which I have done, but shoudl I still consider putting some type of sound absorbent material behind them to help deadin false bass reflections. Or will just keeping them from the recommended distance from the wall be enough. Thanx, pm
 
You definitely want absorbent behind your monitors, whether or not they have rear ports or passive radiators (like some mackies) the ports and passive radiators only affect the lowest octave, but sounds lower than around 300 hZ "wrap around" the box and will cause early reflection problems off the wall behind the speakers. Using several inches of absorbent on that wall kills most of this, and makes your speakers act more like they were flush mounted (more even frequency response)

HTH... Steve
 
How bout just wrappin' the backs of the monitors with absorbent? Sort of along the lines of: "Screw the walls; let's get to the *source* of the problem."
 
Won't work - lower frequencies "wrap around" fairly large objects and so they will reflect off the walls BEHIND the monitors. That's why the absorbent needs to be thick and clear across the rear of the desk area. Then, you can get the speakers much closer to the wall and still get good even response.

Another thing that works is extending the effective size of the speaker baffles by building soffit mounts for the speakers - if you can make the baffle extensions at least 4 woofer diameters in any direction from the woofer, you force the speakers into "half-space" mode so they only radiate forward - this cleans up a lot of acoustic "crap" but takes a bit of room space. Sort of like this -

http://www.moultonlabs.com/slides/smallrooms/sld099.htm

Yeah, I know it's over the top for apartment dwelling but it sure works... Steve
 
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