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| Thread ID: 36015 | 2003-07-28 10:55:00 | Fans and noise | sjbryce (2129) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 163480 | 2003-07-29 04:54:00 | Also agreed Roofus, the residual unbalance of the fans is magnified by the springiness of cpu mounting and motherboard, leading to resonances, flimsy cases etc. They dont balance small fans, but rely on the manufacturing accuracy and centering of the spindle axis. With larger case fans like 120mm, the more expensive ones will have balancing notches cut into the blade tips, but not the cheaper ones. Mechanical resonance noise could be reduced possibly by judicious internal bracing, or screwing heavier plate inside the case walls and also mounting fans on heavier metal plates to reduce the frequency. Rubber mounting could also be tried. Bearing noise transmission is another source. In the end, it's a matter of doing the best with what one has. |
Terry Porritt (14) | ||
| 163481 | 2003-07-29 09:11:00 | Or you could have a mini speaker inside your computer emitting pink noise that would/could counter balance the fan noise | roofus (483) | ||
| 163482 | 2003-07-29 09:52:00 | You don't mention which shop one gets the mini fan from. | Thomas (1820) | ||
| 163483 | 2003-07-29 09:53:00 | Sorry mini speaker. | Thomas (1820) | ||
| 163484 | 2003-07-29 10:03:00 | Even better Roofus, use the computer to analyse and produce anti-phase sound via the sound card. Of course cpu usage could be up to 100% to do that in real time. A pink noise generator would just add to the bedlam. :) |
Terry Porritt (14) | ||
| 163485 | 2003-07-29 10:29:00 | Perhaps if you used artificial time you wouldn' use so much of cpu.;) Amazing what goes on in ones head;) |
Thomas (1820) | ||
| 163486 | 2003-07-29 11:04:00 | My "Tin Box" has got three fans in it & was quite noisy. Took the fan units out & cleaned the blades, Much better. Look at your house cooling fan to see how much dirt sticks to the blade edges. Considered playing soothing music off your M/c whilst you are working? Poppa John :D |
Poppa John (284) | ||
| 163487 | 2003-07-29 12:34:00 | Correct Poppa J, thanks for the music tip. Sure to help. Just like what Roofus told us a few posts ago. Re: Fans and noise Everyone always looks to the fans when trying to reduce the noise of their PC, however a bit of insulation also wouldn't help. Cases are cheaper today than they were a couple of years ago for a couple of reasons, one of them been that they are less vibration resistant and less noise reducant So we dont need to bother with insulation? and the cases are less noise 'reducant'.. good show, but I'm confused. Can anyone find that in any dictionary.. |
Bazza (407) | ||
| 163488 | 2003-07-29 13:06:00 | Sure,if the correct spelling is used. reducent \Re*du"cent\ (r?*d?"sent), a. [L. reducens, p. pr. of reducere.] Tending to reduce |
metla (154) | ||
| 163489 | 2003-07-29 13:08:00 | and the cases are less able to reduce noise...perhaps. No such word as reducant,or at least not in the shorter Oxford dictionary;) You could do as I have done and make cabinet to sit box etc in,that reduces the sound. |
Thomas (1820) | ||
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