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Sound dampening/Acoustic foam

post #1 of 19
Thread Starter 
Im starting a project for a new silent case and I'm doing my own Acoustic foam

Whats the best type to use?

Here's what I'm looking at:
*2LB Density
1.5" Egg crate
2.5" Egg crate

1" or 2" "Wedge" style
1" or 2" Pyramid style

or whatever the "noise dampen material" that's sold at FrozenCPU/PerformancePCs... or perhaps a combination?
 
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post #2 of 19
I have used the bumpy material and it worked quite well. I also have used just the solid sheets and that was almost as good. I think the bumpy material absorbs more sound, or atleast prevents the soundwaves from moving as much
post #3 of 19
Thread Starter 
When you say bumpy, you mean the eggcrate design?
 
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post #4 of 19
What is your goal? Are you trying to stop airborne noise, or trying to dampen vibrational noise? Thick eggcrate type materials stop airborne noise. To dampen vibrational noise you need something dense/heavy, like bitumen sheets.

BTW it is 100X easier to create less noise than it is to stop noise that is already created.
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post #5 of 19
Egg-cartons are crap; get the proper foam smile.gif
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post #6 of 19
Thread Starter 
Quote:
Originally Posted by Zap;13500384 
What is your goal? Are you trying to stop airborne noise, or trying to dampen vibrational noise? Thick eggcrate type materials stop airborne noise. To dampen vibrational noise you need something dense/heavy, like bitumen sheets.

BTW it is 100X easier to create less noise than it is to stop noise that is already created.
My goal is to stop airborne nois eand vibe noise. I've removed as many sources of noise as I possibly can. I have Four 140mm fans on a fan controller, mostly sitting at minimum speed, one 180mm fan also on fan controller, and an 18W pump. Nothing else in the case should be making noise. The only thing I can really do is to completely shut off a fan.

I purchased AcoustiPack from Frozen CPU at ~$50 has 3 sheets of dense foam I can layer around. I may pick up some nice looking Pyramid foam for visual effects and additional noise dampening
Quote:
Originally Posted by newphase;13500402 
Egg-cartons are crap; get the proper foam smile.gif

Your post would be so much more useful if you could tell me what the proper foam is, and where to get it.
 
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post #7 of 19
Quote:
Originally Posted by TitaniumClocker;13507070 
Your post would be so much more useful if you could tell me what the proper foam is, and where to get it.

Well, I got mine from cutfoam.co.uk - but given that you appear to be using dollars, I have no idea where in the world you are and given that you have found and registered on this site, I rather stupidly assumed that your interwebs-skills stretched at least to http://www.google.co.uk/webhp?rls=ig.
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post #8 of 19
Quote:
Originally Posted by TitaniumClocker;13507070 
My goal is to stop airborne nois eand vibe noise. I've removed as many sources of noise as I possibly can. I have Four 140mm fans on a fan controller, mostly sitting at minimum speed, one 180mm fan also on fan controller, and an 18W pump.

Sit the pump on something soft so it doesn't transmit vibrations to the case.

See if you can get by without some of the fans. For the remaining fans, if they use normal screws to mount, use ultra soft fan mounts like these. Note that the link is just an example. They are made in different shapes for different applications, such as if you also need it to hold a fan grill, or if your fans have closed corners. They shouldn't still be on the market, but avoid Sunbeam branded white ones, because those are made of fail - AKA hard rubber. In any case, soft mounting them will reduce vibrations at the source. This is much easier than to try absorbing vibrations once they are already transmitted to your case. Oh yeah, avoid those whole fan gaskets. Those don't do much for noise/vibrations.
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post #9 of 19
Egg crate would be the most effective for this situation.
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post #10 of 19
The fan in your PSUs and your HDs will also cause unwanted vibration and noise.

If you havnt already then install some HD dampening kits of some-sort - I dont know where you get them from exactly. Not a whole lot you can do about the PSU though.
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