- Posted by Squonk (A) on September 09, 2006 at 19:07:21
I was thinking it would be easier to hang absorbtion panel from ceiling like a baffle and also gain more effect?
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I was thinking it would be easier to hang absorbtion panel from ceiling like a baffle and also gain more effect?
All reflections occur at the room boundaries, so you'll do better to have the panels parallel rather than suspended in the air as you drew. This does not have to preclude getting absorption from both surfaces. If you space a panel a few inches off the wall, sound can get to the rear and be absorbed. Adding an air gap also extends the absorption to a lower frequency which is always welcome. The ideal air gap is equal to the material thickness. So if you use foam or rigid fiberglass four inches thick, a gap of 4 inches is perfect.--Ethan
The hanging baffle configuration *should* be a more efficient use of absorber because of the greater exposed surface area. However, hanging a conventional 2 foot wide panel might look weird unless you have a very high ceiling. I think most of the readily available panels designed for hanging are 2 or 4 feet wide, meant to be hung in an auditorium, gymnasium, or other large space.At one point in time, I wanted to DIY a bunch of 4'x6"x2" fabric wrapped hanging baffles for my ceiling, using 703FRK with foil facing rearward and absorber facing forward. But I would have had to make a who
I think instead of hanging 1 large baffle I will hang 2 or 3 smaller ones. Maybe hang 3, 1' by 6', baffles in the first reflection area. I don't see a reason why glueing 2 acoustic foam panels back to back then hanging them wouldn't work? And, you can get them in white to meld in better with the white ceiling. Yup I just convinced myself. I am picking up, or probably will have to order, some acoustic foam tomorrow. The trick will be cutting the panels to size with a razor. I will just put the side I cut toward the ceiling. Hmm, I wonder how an electric knife would work?
If you don't mind the appearance of the foam, I think the idea would work out well. My only additional suggestion would be to make 6 1'x3' panels instead of 3 1'x6' panels, that way you can leave a gap in the middle and center the two sets of panels on the two first reflection points.Dave
P.S. I don't know why my original post got chopped off. What I meant to say was that I considered making a set of 6" wide panels, but I felt it would be too much effort. I would have needed a lot of panels and I wanted them to be fabric wrapped and look tidy. Instead I mounted standard 2" thick mineral wool panels horizontally, spaced 1/5" off the ceiling, and will hide them behind fabric stretched over a light wood frame.
Like this.
it should work either way but the hanging baffle would look strange. Room would feel congested. That's unless you have space to spare, such as in control rooms where they have acoustic hangars of varying size behind false fabric ceilings. Then again, the increased surface area of a hanging panel would be a logical strategy for contending with low frequencies, and not the most practical way of dealing with first reflection.
I have room to spare and I don't have WAF to contend with. However, as one gentleman pointed out, I may not have WAF to deal with, but, I still have me to please. I guess it's pretty easy to say, "I don't care what it looks like I just want the best sound" before you get started with serious room treatments then afterward have a room that is so gawd awful ugly that you don't want to spend time in there. Still, however, aesthetics are low on the list. lol
