Acoustic enclosures are used to reduce computer noise. One of my desktop
computers has six hard drives and six fans. Kell Systems is one company
that sells enclosures in this market. See http://www.kellsystems.com /
Features typically include noise reduction, air flow to extract heat, cable
paths for power and peripherals, and doors for easy access.
On Thu, 1 Oct 2009 10:31:23 -0700, "Christopher Glaeser"
Ok, that sounds reasonable. In retrospect, I have heard of an acoustic
enclosure before, just for printers, not computers. Noise from older
computer systems of mine was something I used to just accept, having
multiple SCSI drives and the fans to keep them cool. Then I upgraded a
little while ago with fewer drives, forgoing SCSI for SATA drives and
when I bought fans for it, I choose the ones with a smaller noise
The only problem I have now is that I bought an i7-650 extreme
processor and a Cooler Master V10 cpu cooler to go with it. The cpu
cooler is damned near the size of a football and I'm dreading trying
to fit it in the case I've got even though it is a monster tower case.
And no, I'm not going to try water cooling. :)
Every other house in Nashville has a studio in the basement, so you see
all kind of crazy stuff.
A fridge in the studio is a great thing to have for keeping water and
juice and snacks and whatnot.
One guy had a fridge, built into the wall. You couldn't hear this
refrigerator when the compressor kicked on because it was behind the
wall and he did a great job of sealing up around the fridge.
This one was the kind with the cooler on top and the freezer on the
bottom. He had disabled the freezer section and used it for the
acoustic computer enclosure, with a fan and access in the back, from the
other room. It was brilliant and worked like a charm.
"Playing is not something I do at night, it's my function in life"
All those McMansions popping up all over the place use much more power
than any home studio, just to light their shrubbery. :-)
A whole rack of effects, processors, preamps, along with the computer,
guitar amps, control room speaker amps, etc., won't pull more than one
or two 15amp circuits could handle.
"Playing is not something I do at night, it's my function in life"
Monitor the temperatures and you can compare the performance of various
Another "solution", and an effective one if your layout affords it, is to
put the computer
in a room on the other side of the wall, and to string through the cords
for the monitor keyboard, mouse and speakers.
You could even "caulk" the hole! : )
I've actually been considering this for the computer in our master
bedroom. The other side of the wall is a coat closet that mainly holds
old junk, so it would make an ideal computer closet with the addition
of a good vent fan. I may decide to re-visit that idea....
"I'm not exactly burned out, but I'm a little bit scorched and there's some
On Thu, 01 Oct 2009 13:20:06 -0400, the infamous firstname.lastname@example.org
scrawled the following:
Before I got this whisper-quiet ACER, I was thinking about doing that
same thing for my old computer. I HATE fan noise when I'm thinking.
I was going to build two open-ended rectangular boxes about 3"
different in height and 6" different in width, then line the inside
with either foam carpet padding or carpet itself. I aimed to do the
same thing for my compressor.
The pooter is 7w x 18d x 14h.
The inside shell would be 10x20x15.5, the outer 13x23x18.5
One end and the bottom would be open on each shell.
A 4" hole near the bottom in the back of the small shell would let in
all the cables and be acoustically baffled by a towel wrapped around
the opening after cable routing and shell placement, open end front.
The front shell would fit around the smaller shell, providing 1.5"
clearance for air intake on 3 sides, open end back. It would slide
off for insertion of DVDs, or if I were playing/loading DVDS more
frequently, I might make an openable door on the top of the front.
Baltic birch plywood and 3/4" cleats, glue, and "a few brads to hold
it while the glue sets" make up the boxes. Once the cleats were glued
and set, I'd glue the carpet down to the inside with acrylic mastic.
It sets in a day and doesn't stink much while curing. Then I'd glue
the panels up and brush on some Waterlox.
Set 'em outside to degas for a couple weeks and Bob's yer uncle.
These might look a lot nicer if you used steel or aluminum sheet and
wetsuit foam, for that commercial look.
IAC, the foam or carpeting + angles should soak up a -whole- lot of
the fan noises. Maybe Swingman could work up some drawings of these
for you. (About 3 minutes with SketchUp, wot? I'm getting ready to
buy a new computer so I won't be installing it on this old job.)
"Giving every man a vote has no more made men wise and free
than Christianity has made them good." --H. L. Mencken
On Thu, 1 Oct 2009 09:51:42 -0700, "Christopher Glaeser"
Start with a quiet tower PC case with 120mm slow-running fans. Put
the computer on a carpeted floor. Replace many hard drives with a 1T
The only thing I built is a wheeled base, made from some scrap pine,
painted black with a front pull.
Or, I could use an HP calculator; those are pretty quiet. :)
FWIW, I have 10 terrabyes of storage that includes a system drive, data
drive and raid array. Squeezing into a single 1TB HD is not an option. I
was thinking more of a woodworking solution.
That isn't a desktop computer, it is a server, or should be.
Why not just network into it, then you could move the machine far away
from your desk? i.e. got a garage, closet etc. where the noise would
not be an issue.
It's a desktop computer for video editing.
Silly me, I thought if I posted to the woodworking forum, someone would
suggest a solution that would use one of those tools with a round wheel with
sharp teeth, um, I think they are called table saws. My apologies for the
technical jargon. Perhaps if I post this question to a computer forum they
will provide plans for a 3/4" birch plywood enclosure. I'll let you guys
get back to whatever it is you discuss on this forum. Certainly can't be
On 10/01/2009 02:53 PM, Christopher Glaeser wrote:
Actually, from an overall perspective his post is a good one. A sound
absorbing enclosure would kill the sound somewhat, but it's going to be
big and bulky. Better to move the noise elsewhere to start with.
Here's what I'd do, starting with free and moving progressively more
1) Move as much noise as possible out of the room completely. This
includes things like your NAS and your gigabit switch.
2) Reduce the power requirements on the computer as much as possible.
Without changing the hardware this basically means move stuff from your
10TB of local disks to the NAS. Ideally you want to get rid of entire
drives from your desktop machine. Reduce the number of case fans and/or
run them as slowly as possible without causing too much heat buildup.
3) Enclose the tower in a sound absorbing enclosure. I'd go with a
large box made of MDF or particleboard (solid wood resonates more), with
sound absorbing panels on the inside and mass-loaded acoustic barrier
sheets on the outside, with baffled air intake and exit. You want the
air to have to travel in a zigzag pattern so that there is no direct
path for sound to escape.
4) Reduce the noise on the remaining components. This starts to cost
money. Use quieter/fewer fans, more efficient cpus, quieter heatsinks,
quieter video cards, quieter power supplies, cases designed for cooling
and sound absorption, quieter/cooler hard drives, etc. Basically go and
The local RAID is required for uncompressed HD video editing.
I was thinking along the same lines, but check out the 3D Model Tour at
It appears the air intake is at the bottom back of the unit, and the air
exhausts are a relatively simple modular package at attach to the back of
the unit. Each exhaust module has three fans at an angle that force the air
down and out through side ports. Is that how you imterpret this model? In
other words, all of the Kell air flow is at the back from bottom to top.
They make no attempt to force air to the front of the rack, so each rack
unit is responsible for pulling air into the front and out the back, and
then the air exchange happens at the back where the Kell vertical air flow
exchanges with the rack unit exhaust. Is that the way you see it?
PS: Pause the video as necessary to examine the exhausts.
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