Porous Absorber Calculator problem and another question about a bass trap

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sys40198

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Hello people,
I dl the Porous Absorber Calculator and I can't get it to work with excel 2011 for mac! Apparently the new excel for mac does not come with the Analysis Toolpak (wack right?) and i cant find it anywhere online. I was wondering if anyone found a way around this problem or knows a way i can still use this.

I'm also just starting to do some acoustic treatment for my room and decided to start off with some SSC bass traps (pretty tall, ~10.5 ft...got a pic of it). I got one all built with the frames and realized i could see through the fabric. But I went to the hardware store the other day and saw this wall panel that is around 2mm thick and has a white melamine face on what i think is particle board. Im just curious if i could use this as my face and ditch the frame all together.
I know it'll reflect the high and maybe the mid frequencies, but i thinkin' I can probably take care of those later on with porous absorbers at reflection points. Don't know for sure how it would affect the low end tho (thinkin...hoping it'll be fine tho). It would be awesome cuz it would match my walls (it would look like part of the wall) perfectly and save me sometime on my other corner bass traps.
Would this work? Or is it too good to be true?
Any help would be much appreciated, Thanks!
 

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A bass trap and a flat hard panel in the corner are two completely different things!
 
Ya I mean I have a bunch of mineral wood behind the frame (I'm 99.9% sure this is a superchunk bass trap) I was just talking about replacing the fabric/frame with that 2mm think wood panel, I would still have the insulation behind the panel.....or r u trying to tell me that the panel will block most (or all) of the low frequencies from reaching the insulation? I was hoping it wouldn't :(
 
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u might want to post this in studio building - there are people hanging out in there that can answer this - I think you need to have the wool or fiberglass as the face, not covered with a solid piece of material but I am not positive
 
There's a couple things wrong with that setup.

First off, a melamine panel in front of the insulation defeats the purpose of the trap by making it into just another reflective surface that happens to have a bunch of insulation behind it.

Second, to be effective the trap needs to be at least 18" wide across the front, and 24" is better. Cover it with cheap muslin or nice hemp stapled to a wood frame. The narrow width of that frame doesn't allow enough depth to take advantage of the superchunk. You might as well just put a 2" thick piece of Knauf or 703 with some cloth on it across the corner and leave it at that.
 
Ya ill let you know how it goes. I'll actually probably do some tests with the regular frame and with the hard panels. I'm told they're thin enough to let LF pass, but they will resonate, so it may cause some issues.
Second, to be effective the trap needs to be at least 18" wide across the front, and 24" is better. Cover it with cheap muslin or nice hemp stapled to a wood frame. The narrow width of that frame doesn't allow enough depth to take advantage of the superchunk. You might as well just put a 2" thick piece of Knauf or 703 with some cloth on it across the corner and leave it at that.
Click to expand...
Ya those frames are actually wider than 24" and the insulation does have a 24" face, sorry, id dont think i said that in my original post (the frames look thin cuz my ceiling is pretty high up)
But ya I'll holla back when i get it done

PS incase anyones wondering, i think the Porous Absorber calculator is impossible to use on the new version of microsoft office for mac. I'm jus going to do all that stuff on campus, where they run PCs
 
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