Weird sound from the PC

[chrisvtc]

Hello,
about 2 weeks ago I started getting this weird, quiet sound coming from inside of my PC. It's barely unnoticeable and happens only several times a day, but I'm worried it may be my HDD failing.

I managed to record it my leaving my mic near the case for about 15 minutes. I messed around with Audacity to clear out the background noise and it sounds like this:
https://drive.google.com/file/d/0BzSdDQew4GlPWGQyVWJncHlqTms/view
Can someone help me identify what part it's coming from?

 

[Burpo]

You should take the cover off and listen.. Maybe get an idea of where it's coming from. That is a strange sound tho, almost like a bearing squeak.

 

[JeffMD]

yea, dont ask us, go and listen to your hd. If it is, then replace it, otherwise just a fan or components heating up.

 

[denis280]

sound more like a fan to me