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an "antisound" system tailored to your individual computer, with an intensity knob on the end. Go one better than noise elimination - actually choose how loud your computer is.
hardware volume control
http://www.halfbake..._20volume_20control
[yamahito, Oct 17 2004]
Adaptively Cancelling Server Fan Noise
http://www.analog.c...chives/34-02/noise/
Technical paper from Analog Devices. [pottedstu, Oct 17 2004, last modified Oct 21 2004]
GargantuFan
http://www.halfbake...om/idea/GargantuFan
My ill-thought out attempt at CPU quietude. [bristolz, Oct 17 2004]
[link]
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why? For shits and giggles. It's not as weird (to me) as having neon bulbs in the damn thing... |
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How? if you've got a fairly predictable sound wave, by generating a wave exactly out of phase you can 'cancel out' (not quite, but hopefully you get the idea) the original sound. I'm hoping that the sound a computer makes is predictable enough to make this possible without having to resort to hugely processor intensive on the fly sound analysis. |
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Ok, now you're talking. You could throw a chip in it dedicated to active sound deadening so you don't have to use the processor. |
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You could even get it to boost the volume up, as well, for the 'power user' sensation. |
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whisper...yama...whisper... whats a?...whisper...int...ssshhhh...kn...shhh...whisper |
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Silly po, its a ... whisper ... bucket ... anneka rice ... manure .. whisper .. which is why sctld amuses me so much. |
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whisper..lovely bum...whisper...knob? ...whisper...treasure hunt - great stuff.. bucket?.. |
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or... buy... a... freaking... iMac... which... is... already... quiet. (no fan=no fan noise). |
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[roby]: //iMac... which... is... already... quiet//
I wish that were true, but there's the issue of that spinning hard drive...
[miasere]: It wouldn't require alot of power. The noise coming from the fan is *very* steady and predictable. You'd only need to analyze the noise once, and then generate the resulting cancelling waveform. |
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But what happens when the waveforms drift out of sync? The dampening waveform would have to constanly and precicely synced to the fan's waveform. Also, fans dont spin at a perfectly constant RPM. If your motherboard supports fan speed monitoring, you will see that it drifts all over the place. A dedicated sound dampening chip would be requiered to make this work. It does seem like a nifty idea though. |
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Active sound cancelling of computer fans is baked by Analog Devices (see link). It uses a very cheap DSP and simple hardware, so a mass market solution would not be expensive. |
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The article also has a detailed discussion of the characteristics of fan noise. |
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[cedarpark] Hard drives spin only when data is reading/writing to disk. Less than 10% of the time. You should try an iMac. |
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Just fit a six foot diameter fan. |
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Instead of *hmmmm*, you'd get *whom, whom, whom*. |
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Very rhythmic and relaxing. |
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Nice and cool in the summer too! Might have to glue your RAM and cables in though. |
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for my needs, imacs suck. You can't customize them to the degree I want to, you can't overclock them, and most of all, you can't run 'doze XP on 'em. |
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Besides, I run at least one of my servers without a fan, but for the serious heat modern processors will produce, it ain't suitable. |
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Enough of the mac/pc flamewar, though - let's lose it from this thread from now on. |
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Idea = method of mitigating computer fan noise
imac = computer without fan noise
annotation = relevant
roby = just a mac fan
this anno = last word for roby (thanks yama) |
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//fans dont spin at a perfectly constant RPM. If your motherboard supports fan speed monitoring,// |
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You just answered your own point.. |
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