Why not pass it over to us & become a famous SPCR like LeoV and Rusty? :wink: hehe, well, I picked up a carload of materials from Home Depot today. I spent 3 hours in HD! I think some of the staff there must've caught on the the fact that I was working on a nifty project-- I spent a good hour sitti...

[quote="wussboy"] I hope you were implying you'd post those and let us take a peek? hint hint. :) [/quote] Of course! ...Actually, currently I'm thinking that after work tomorrow I'll make a run to Home Depot to see how expensive MDF or some other wood-like material is-- if I can afford to make it i...

Heh, this quest-for-silence has got to be some sort of a disease in itself. I've just ordered several more Panaflos from BG Micro (to silence other computers in the house that now annoy me as I walk near their rooms), and I'm realizing that my undervolted panaflo-cooled, harddrive-decoupled system i...

Mike, regarding the resonant frequencies of your ducts, that implies to me that your damping material may not have been particularly effective-- resonance only occurs if the sound *can* bounce back and forth to give constructive interference. If you can eliminate or nearly-eliminate the sound-bounce...

Taking a look at that website, their solution is remarkably-similar to a design that I came up with a couple of years ago as part of a 4-th year project at UBC. The enclosure that I designed had its noise-reducing baffles along the right side of the case, whereas this Cocoon cabinet has it's intake ...

Not quite what I'd expect somebody to ask, but... 1) Not WD, probably not the recent Maxtors, and I think Samsung drives aren't too noisy either. WD is probably a good bet for a fairly loud drive. Don't take my word for it, though, as 2) Hmmm, to make a drive noisier... Well, bolt it directly to the...

The amount of metal you need for your sandwich is really small-- if there's a metal fabricator in your area, stop in and ask them if you could have a look in their scrap bin-- worst-case scenario is they'll say 'no'. I got some neato checker-plate steel from a nearby shop a few years ago while worki...

Incidentally, as I've mentioned in other threads, cork has a very poor noise-reduction coefficient. Medium-density fiberglass (such as that used in ceiling panels-- cheap at home stores) is an **order of magnitude** better than cork at reducing the amount of noise bouncing around.

What's a WOL cable? Do you have any links to pictures?

Since P=IV (where I is the current flowing through the circuit and V is the voltage drop over the resistor or diodes), you'll have the same amount of waste heat with diodes as you would with a resistor-- I've calculated it out to somewhere in the neighbourhood of 0.4 Watts to undervolt a 12V 0.1A fa...

I don't think that the Athlons are necessarily *that* bad for quiet computing-- certainly they've got higher power consumption than a comparable P4, but they can still be made quiet. I've got an AthlonXP 1600+. I've replaced the stock CPU fan with a Panaflo 80MM L1A (undervolted to ~7.5v). The heats...

[quote="MikeC"]A basic problem with opening up the PSU to measure temps: the temps change as soon as you remove the cover, as the normal airflow through the case is totally disrupted. I have already measured this effect.[/quote] True, it probably wouldn't be very accurate, though the results could s...

[quote="siliconacoustics"][quote]Many other points in the post are right-on, but this one skipped a beat. [b]Total heat in = Total heat out.[/b] The smaller [i]heatsink[/i] will get hotter because it's shedding the same watts in less area. The hotter heatsink might fiddle the electrical performance ...

Several things should go into a drive-isolation design. An important consideration is that the metal will not absorb much/any sound itself-- rather, the sound will reflect within the drive enclosure (the sandwich plates). The purpose of the foam/fiberglass within the sandwich is to reduce the intens...

A note as far as sound transmission coefficients goes is that lighter and stiffer materials will transmit sound more effectively. Lead is highly-effective at stopping sound since it won't re-radiate very much at all. Steel is also good, copper would also be good. Aluminum isn't as ideal, although it...

The computer that I'm sitting at right now has IE6, and the chart displays incorrectly.

(Normally I use Netscape 6, but my normal machine is currently undergoing a stress-test to see if I have adequate cooling with the nice and quiet Panaflo fan that arrived in the mail today...)

In a computer noise research project I did a couple years ago, I found that adding sound-deadening material in most cases had very little effect on noise levels outside of the case, and for some frequency bands, noise outside the case actually increased. If you're looking for sound deadening materia...

icchan, I don't think the 7v mod could be harmful/stressful to the PSU. A resistor is a passive component, and all you're doing is sticking it in front of the fan-- it won't appreciably increase power consumption (the resistor will likely be dissipating something in the neighbourhood of 0.5-0.8 Watt...

One other thing you may want to try is updating your virus scanner and checking for viruses-- some backdoor-type trojans can allow an attacker to reset the machine. I had an issue for a while with my server rebooting randomly (a 300MHz machine with no heat problems, voltages all within spec), which ...

I managed to find my report on an old backup CDROM. I tossed it on my website and I've thrown together a quickie webpage for it:

http://mtrs.org/MTRS/noisecontrol.html

Last night I was out for dinner with a friend whom I hadn't seen in months, and she suggested that I pick up the Georgia Straight since it had an article about computer noise, and she remembered that I have an interest in noise control. This morning I picked up the Straight, read the article, and wa...