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post #91 of 256
I bet that write up use to say ...

They are commonly used for packing and insulating. Foam has open-cell construction, which allows water and air to be absorbed.

... but then some science type asked about gases that aren't present in 'air' and so they modified it to the statement above ... just to really annoy all other science types by insinuating that 'air' and 'gases' are different things (ie 'air' is not a sub-set of 'gases').


biggrin.gifbiggrin.giftongue.gifsmile.gifsozo.gifwheee.gif
post #92 of 256
Quote:
Originally Posted by Duality92 View Post

This is the foam I have that I will be using mostly : 87035K54 SKU on McMaster-Carr.
Warning: Spoiler! (Click to show)
Super-Cushioning Ultra-Conformable Antistatic Polyurethane Foam Sheets

Color: Pink
Temperature Range: -20° to 180° F
Cell Type: Open
For Use Outdoors: No
Density: 1.4 lbs./cu. ft.
Pressure to Compress 25%: 0.3 psi (Ultra Soft)
Protect sensitive equipment from damage. In addition to providing gentle cushioning support, these sheets conduct static electricity away with a surface resistivity of 1011 ohms. They are commonly used for packing and insulating. Foam has open-cell construction, which allows water, air, and gases to be absorbed.

While all foam will have some noise dampening characteristics, not all foam will have the same amount of it. I used 7mm AcoustiPack sound deadening foam to reduce the sound coming from my present rig and it is very effective. Beside blocking sound transmission, it's denser mass also damps case vibration, which is where a lot of computer noise comes from. The only noise I hear from my computer is the gentle swoosh from air being drawn through filters (and I can barely hear that from three feet away when my room is dead silent, which is almost never). Even that sound can be reduced, or even eliminated, by reducing the speed of the air going through the filters (more fan and filter surface area will allow the same total airflow with less airspeed).

Fan positioning also determines how much sound one can hear. I have two fans on the front of my case and one on the side. Besides extra sound being generated by the filters, the sound from both have a pretty direct path to my ears when I'm setting at my desk three feet away from them. The rear exhaust fan, however, is pretty much silent, even if cranked up all the way mostly because the sound has to almost do a 180° turn to get to me (not being filtered is also a factor).

Performance PCs is coming out with an even thicker foam (12mm; also, more expensive) that will come by the foot in up to 54" sheets so I'm going to wait until the case I'm building ist pretty mnuch finished before ordering any
     
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post #93 of 256
Thread Starter 
Quote:
Originally Posted by Lady Fitzgerald View Post

While all foam will have some noise dampening characteristics, not all foam will have the same amount of it. I used 7mm AcoustiPack sound deadening foam to reduce the sound coming from my present rig and it is very effective. Beside blocking sound transmission, it's denser mass also damps case vibration, which is where a lot of computer noise comes from. The only noise I hear from my computer is the gentle swoosh from air being drawn through filters (and I can barely hear that from three feet away when my room is dead silent, which is almost never). Even that sound can be reduced, or even eliminated, by reducing the speed of the air going through the filters (more fan and filter surface area will allow the same total airflow with less airspeed).

Fan positioning also determines how much sound one can hear. I have two fans on the front of my case and one on the side. Besides extra sound being generated by the filters, the sound from both have a pretty direct path to my ears when I'm setting at my desk three feet away from them. The rear exhaust fan, however, is pretty much silent, even if cranked up all the way mostly because the sound has to almost do a 180° turn to get to me (not being filtered is also a factor).

Performance PCs is coming out with an even thicker foam (12mm; also, more expensive) that will come by the foot in up to 54" sheets so I'm going to wait until the case I'm building ist pretty mnuch finished before ordering any

this is why I'll be using foam board too. This pink foam will be the core of the sound dampening, but most of what you will see likely won't be pink. I have some black egg crate denser foam that I will be using also.

Basically, my plan is to have all case sides have Steel of the case > pink foam*1 or *2 > foam board > pink foam*n (to fill) > egg crate foam, this way, I'll be creating various sound barriers.
post #94 of 256
The convoluted surface of egg crate foam does improve sound deadening by breaking up sound reflections but it eats up more space inside a case (space is something I'm really short of). What I like about the AcoustiPack foam is it is effective but takes up little space in a case. It's downsides are cost (it isn't cheap) and weight (it's surprisingly heavy!).

Of course, I'm not striving for the most silent case ever; just merely silent enough. I don't mind the gentle whisper of air from three feet away during the extremely rare periods when my house is silent enough for me to hear it. I learned some time back that I don't need the best of everything; good enough is good enough.
Edited by Lady Fitzgerald - 8/22/16 at 10:30am
     
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post #95 of 256
Thread Starter 
Quote:
Originally Posted by Lady Fitzgerald View Post

The convoluted surface of egg crate foam does improve sound deadening by breaking up sound reflections but it eats up more space inside a case (space is something I'm really short of). What I like about the AcoustiPack foam is it is effective but takes up little space in a case. It's downsides are cost (it isn't cheap) and weight (it's surprisingly heavy!).

Of course, I'm not striving for the most silent case ever; just merely silent enough. I don't mind the gentle whisper of air from three feet away during the extremely rare periods when my house is silent enough for me to hear it. I learned some time back that I don't need the best of everything; good enough is good enough.

Space is something I will be trying to get rid of in this case xD
post #96 of 256
Quote:
Originally Posted by Duality92 View Post

Quote:
Originally Posted by Lady Fitzgerald View Post

The convoluted surface of egg crate foam does improve sound deadening by breaking up sound reflections but it eats up more space inside a case (space is something I'm really short of). What I like about the AcoustiPack foam is it is effective but takes up little space in a case. It's downsides are cost (it isn't cheap) and weight (it's surprisingly heavy!).

Of course, I'm not striving for the most silent case ever; just merely silent enough. I don't mind the gentle whisper of air from three feet away during the extremely rare periods when my house is silent enough for me to hear it. I learned some time back that I don't need the best of everything; good enough is good enough.

Space is something I will be trying to get rid of in this case xD

In my case (pun intended), I want as much space as I can fit in the limited space I have for the case (did that make sense?) to spare my old hands and back.

Btw, I'm not knocking what you are doing.
     
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4TB Samsung 850 EVO SSD 4TB Samsung 850 EVO SSD LG 12X BD-ROM 16X DVD-ROM 48X CD-ROM SATA Inter... COOLER MASTER GeminII S524 120mm Long Life Slee... 
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RAMHard DriveHard DriveHard Drive
Kingston HyperX 32GB (8 x 4GB) 240-Pin DDR3 SDR... 128GB Samsung 840 Pro SSD 4TB Samsung 850 EVO SSD 4TB Samsung 850 EVO SSD 
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post #97 of 256
Thread Starter 
Quote:
Originally Posted by Lady Fitzgerald View Post

In my case (pun intended), I want as much space as I can fit in the limited space I have for the case (did that make sense?) to spare my old hands and back.

Btw, I'm not knocking what you are doing.

I understand that and it does make sense. What I will be doing, is reducing the volume of the interior of my case to create air pathways. The air traveling will HAVE to go through these pathways, thus cooling things much more efficiently. Having a huge volume of air inside a case, doesn't help the fans too much. This is the same as 1U servers that have tiny 40mm fans and are able to cool 4++processor rigs. I could have nothing but an intake fan and exhaust fan and still be able to use my radiator passively, but I want more performance than that wink.gif

I know you're not, I just always feel the need to justify myself xD
post #98 of 256
Thread Starter 
So, I bought the last piece of the puzzle yesterday and while you're reading this, I'll be updating the OP smile.gif
post #99 of 256
Have you started on this yet? I get the feeling you get some sick pleasure from teasing the masses tongue.gif
post #100 of 256
Thread Starter 
Quote:
Originally Posted by comagnum View Post

Have you started on this yet? I get the feeling you get some sick pleasure from teasing the masses tongue.gif

I love building hype.

However, I got my FX-8350 yesterday along with my RAM. I installed the CPU block too. I have everything I need for this build on hand except my Fractal Design care package (psstttt @Fractal Design, @Fractal NA)
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