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[Geek]Noctua creates world’s first CPU cooler with active noise cancellation - Page 3

post #21 of 36
I don't get why anyone needs something like this, I literally can't hear my AIO cooler.
post #22 of 36
my cpu cooler is already effectively noiseless at sitting distance. good acoustics aren't difficult to achieve with careful fan selection and case layout, but I respect the innovation, especially if the technology eventually makes its way to individual fans and other components.

I think Noctua is looking for the cooler to be more of a showcase item, and in that capacity it will probably work quite well. It will sell to people looking for the novelty, but I suspect anyone counting their pennies or measuring cost:perf is gonna be in for some sticker shock.
    
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post #23 of 36
I wonder how effective the noise cancellation tech would work with one of those jet engine 120mm Delta fans?
Quote:
Originally Posted by vampirr View Post

Well fans don't need that much maintenance compared to water coolers, right?

But at least you don't have to worry about the AIO snapping your mobo in half because somebody tipped the desktop over.
post #24 of 36
From the video it appears to only eliminate motor noise, which seems a bit pointless since quiet fans (like Noctua's) make so little motor noise to begin with. Unless you're cranking them at max RPM I doubt you'd even notice a difference.

I can put my ear right next to my Gelids and not hear the motor at all up until ~1300RPM.
post #25 of 36
Quote:
Originally Posted by A Bad Day View Post

But at least you don't have to worry about the AIO snapping your mobo in half because somebody tipped the desktop over.
But what if my baby brother takes off the side panel and chews the tubes and it spills over my components.

But what happens if we get a really cold winter and all the liquid freezes.


Yeh...stop spouting garbage that will probably never happen.
post #26 of 36
Quote:
Originally Posted by avesdude View Post

Active noise cancellation uses destructive interference. If you have two waves and they are in the same phase, they will amplify when combined. If they are halfway off phase, they will combine to zero. The microphone is listening to the noise, and using the speaker to produce the same noise half a wavelength out of phase. They sum to zero, canceling the noise.

Someone more knowledgeable might be able to give you a better answer, but that's the idea at least.
Well you did pretty good actually.
When 2 waves with the same frequency collide being 1/2 wave length of labda apart they will cancel each other out at 1 labda they will stack.
It is much like taking 2 points if one is below the base amplitude deduct from the higher wave if one is above add to the higher wave.
post #27 of 36
I want this for HDD rotors. After quiet fans, HDD spining sound and the rattle start to annoy you.
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post #28 of 36
Quote:
Originally Posted by Booty Warrior View Post

From the video it appears to only eliminate motor noise, which seems a bit pointless since quiet fans (like Noctua's) make so little motor noise to begin with. Unless you're cranking them at max RPM I doubt you'd even notice a difference.

I can put my ear right next to my Gelids and not hear the motor at all up until ~1300RPM.

indeed. I can see how it can help with motor noise at really high rpm, maybe, which is about the only time I ever hear it from my Noctuas, or any of my quality fans for that matter. These days I dont need to run any fan at high rpm, though.Pretty rare that any fan in my case goes over 800.
    
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post #29 of 36
Quote:
Originally Posted by Otterclock View Post

indeed. I can see how it can help with motor noise at really high rpm, maybe, which is about the only time I ever hear it from my Noctuas, or any of my quality fans for that matter. These days I dont need to run any fan at high rpm, though.Pretty rare that any fan in my case goes over 800.
This can also work against you if the difference in phase is 1 labda or a multiple of 1 the noise will just stack (1labda or a multiple of that will make the max stacked noise)
post #30 of 36
Thread Starter 
Quote:
Originally Posted by A Bad Day View Post

But at least you don't have to worry about the AIO snapping your mobo in half because somebody tipped the desktop over.

Nor do you with anything less heavy than a TRUE Copper, apparently my cooler is 1.2KG and I'm yet to notice any bending of a relatively cheap board on it. I'm yet to hear any reports of motherboards breaking from a TRUE Copper at all. (1.9KG without fans)
    
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