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I've recently received a device and it has a fan built into it for cooling, but I've noticed a particular whine with it:
A very high volume 3.7khz pitch whine/noise from it.
What could cause such a noise? and more importantly, what should be the solution?
This is what the fan looks like physically:
I can sympathise.
I recently purchased one of those Ikea Air Quality sensors. At first, I wondered why others had noted online about the fan noise, especially as the fan is tiny, but then sure enough I could hear it and once you do it drives you nuts. It must be the distinctive frequencies.... this is what that air quality sensor fan pushes out noise wise:
Anyhow, I did a quick search online to see if I could find some pictures and I found some on Amazon - this is a screencapture.
I'm guessing here, but maybe try and loosen that screw to see if it makes any difference as could be enclosure related (as @shabaz has noted).
