Helpful ReplyNew Foam

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spacey
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2016/11/12 09:31:02 (permalink)

New Foam

I got these panels to replace 12"x12" wedge type around my desk.
The black wedge I glued to drywall around a decade. They were a mess. Couldn't vac them, they'd just fall apart.
BUT- they did fit together good unlike these. 
I glued these panels to pegboard - 2'x4' -screwed to wall. One run is 2' x 8' other 2' x 5'
Wasn't going to glue them to the drywall-learned that was not good.
Nice to have clean foam but it would have been better if they would have matched up to each other.
Could trim to make them- none of the edges cut to pattern and I needed them full size to fit nice.
Thought I'd mention. May be others that like and expect things to be...right.
 
Oh...burgundy is a nice change from the black. They offer blue too. Not sure why shades/colors limited but oh well.
 

 
#1
craigb
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Re: New Foam 2016/11/12 20:47:23 (permalink)

 
Sounds much better than using egg cartons! 

 
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bapu
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Re: New Foam 2016/11/13 04:05:21 (permalink)
craigb, how do egg cartons sound?
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Moshkito
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Re: New Foam 2016/11/13 09:39:46 (permalink)
bapu
craigb, how do egg cartons sound?




Usually with 3 dozen per cartoon. Eggz that is!

Music is not about notes and chords! My poem is not about the computer or monitor or letters! It's about how I was able to translate it from my insides! 
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bitflipper
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Re: New Foam 2016/11/13 10:00:00 (permalink) ☄ Helpfulby eph221 2016/11/13 10:03:00
Since you've attached the foam to pegboard and screwed them to the wall, consider adding some spacers behind them to create a void between the pegboard and the wall. If you can manage a gap equal to the thickness of the foam you'll drop the lowest frequency they'll be effective at by half or more.
 
The reason for limited color options is that the dye is mixed in with the foam during manufacture. So when they make, say, a burgundy run they'll be making a whole bunch of it at one time. You could no doubt special-order a batch of pink or chartreuse, but it'd have to be a big enough order to justify making several pallets' worth.


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eph221
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Re: New Foam 2016/11/13 10:03:12 (permalink)
bitflipper
Since you've attached the foam to pegboard and screwed them to the wall, consider adding some spacers behind them to create a void between the pegboard and the wall. If you can manage a gap equal to the thickness of the foam you'll drop the lowest frequency they'll be effective at by half or more.
 
The reason for limited color options is that the dye is mixed in with the foam during manufacture. So when they make, say, a burgundy run they'll be making a whole bunch of it at one time. You could no doubt special-order a batch of pink or chartreuse, but it'd have to be a big enough order to justify making several pallets' worth.




 
Yes, the void is important.
#6
spacey
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Re: New Foam 2016/11/13 12:13:15 (permalink)
Thanks for the tips Bit and the color isn't such a deal. Just seems they'd offer more, marketing plus but what do I know?
 
Mainly posted to warn of the quality. I spent $80.00 ( 4 panels)  I felt it should at least be uniform cuts and they should match-up together. I mean they're cut so bad a single panel doesn't even look right.
 
 

The foam? I don't know how much difference it makes with my set-up. I put it up back when I got the JBLs and they have the control software. Pretty cool and it works for me. (the pic doesn't show changes it makes when test is run)
I put the wedges up when I got the speakers and put this stuff up so I didn't have to repair and paint the drywall and I also like the dark background. 
 
Maybe this stuff will last as long as the wedges. Either way since my DAW is in the den, I'm not trying to be a producer and the stuff is a dust collection problem I'll be repairing drywall and painting when it comes down.
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Moshkito
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Re: New Foam 2016/11/14 10:23:54 (permalink)
Hi,
 
The band I lived with turned the garage into a studio and we used the egg cartons from work, since both Tom and I did most of the morning cooking. I don't recall the distance, but we did double up the egg cartons, with one on top of the other reversed so the higher tops of each up side touched, and that seemed to help trim down a lot of the sound from the neighbors, even though we never did really but it up full sound, but the drums were really the hardest thing to trim down, and Tom had a Carl Palmer kind of setup with a dozen toms and such.
 
Very lovely and interesting time, I only wish I had had more time to study music with them, but it was difficult with me doing UCSB at the time, and working full time, and directing scenes and plays at night.

Music is not about notes and chords! My poem is not about the computer or monitor or letters! It's about how I was able to translate it from my insides! 
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BassDaddy
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Re: New Foam 2016/11/14 10:52:03 (permalink)
eph221
bitflipper
Since you've attached the foam to pegboard and screwed them to the wall, consider adding some spacers behind them to create a void between the pegboard and the wall. If you can manage a gap equal to the thickness of the foam you'll drop the lowest frequency they'll be effective at by half or more.
 
The reason for limited color options is that the dye is mixed in with the foam during manufacture. So when they make, say, a burgundy run they'll be making a whole bunch of it at one time. You could no doubt special-order a batch of pink or chartreuse, but it'd have to be a big enough order to justify making several pallets' worth.




 
Yes, the void is important.


+2 It's all about the void

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#9
batsbrew
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Re: New Foam 2016/11/14 13:00:56 (permalink)
i use 3M Super77
 
for temporary installation....
 
just a little spray on just the foam......
and has held on my current studio installation for over 3 years now.
maybe the size of a quarter, is all i applied, to the center....
 

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Beagle
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Re: New Foam 2016/11/14 13:02:20 (permalink)
bapu
craigb, how do egg cartons sound?


They are NOT flat, I'll tell you that right now! 

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craigb
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Re: New Foam 2016/11/14 13:30:24 (permalink)
Beagle
bapu
craigb, how do egg cartons sound?


They are NOT flat, I'll tell you that right now! 




And they sound better with becan. 
(Duh.  EVERYTHING sounds better with becan!)

 
Time for all of you to head over to Beyond My DAW!
#12
bitflipper
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Re: New Foam 2016/11/15 19:41:50 (permalink)
Bacon might actually make a pretty good absorber, if you had enough of it. And kept the room cold. Cooked bacon, OTOH, would last longer but probably work worse than egg cartons.
 
BTW, I have a pdf here (sorry, don't remember where I got it) that documents a serious (ASTM Standard Test Method for Sound Absorption and Sound Absorption Coefficients) test of egg cartons as acoustical treatments. 
 
They found that egg cartons had an absorption coefficent of 0.82 at 5 KHz, meaning that 82% of the energy was absorbed. That's not bad. In fact it's not much worse than 1" Auralex panels. Unfortunately, below 5 KHz absorption fell off rapidly, and had essentially no effect below 500 Hz. The NRC rating (average of coefficents at 250, 500, 1000 and 2000 Hz) was 0.05, about the same absorption as an unpainted brick wall. It would take 10 layers of egg cartons to equal even a 1" Auralex panel's wimpy 0.5 NRC rating.
 
So rather than being a good absorber, egg cartons are more like placing a low-pass filter across the room.
 
I know, I'm the buzz-kill who makes a serious reply to an innocent becan joke.


All else is in doubt, so this is the truth I cling to. 

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#13
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