Case amplifying fan noise?

The case I have is a Silverstone TJ10 and I'm still using the stock case fans. I have a 212+ CPU cooler for my i3-2120. I think the 212+ fan is quite noisy to my standards even at 1100 rpm I hear a noticeable hum. I have a few friends who own this same cooler but on cheaper mid towers and they swear it is completely silent. Is it possible that the case is amplifying the fan noise? I have well trained ears so I'm able to easily pick out sounds. I think my definition of silent is very different from his.

What do you guys think?
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  1. Best answer
    Chances are that you have a bad fan but like you say people hear things differently. I do not believe it is the case at fault.
  2. Just make sure it's seated well and see if anything is clogging it up. If your good with your hands you could try replacing bearings/oiling the right area's but thats abit extreme.
  3. it is most likely air resonance in your case being amplified by the large, thin, side panels.

    To fix it you need to put some thick foam on them. To test put your hand against the panel and push it in a little bit (not too hard obviously) if the noise stops then you have your problem otherwise it could be a bad fan (not just the CM 212 one) or you may just be more sensitive to it than your friends.
  4. I pushed against it a bit and the panels are actually quite stiff. No change in noise at all.

    The fan isn't "loud", but to me it is just a really really obvious low hum. Not my definition of silent or very quiet.
  5. Best answer selected by ohhgourami.
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