Noise in headset while folding O.o

[ubersonic]

Is this normal/common? should I be worried?

I have a USB Creative Fatal1ty headset I bought from here and I usually only fold while AFK on my home machine, however I went to answer an MSN message and put my headset on out of habit and I heard a background rumbling, kind of like a motorcycle or muscle car burbling on tickover, it was faint hence why I didn't hear it with the headset on the desk, its defiantly related to F@H as it starts/stops with the start/stop CPU folding button lol.

Thoughts?

 

[TheTross]

It's just electrical noise coming from the CPU - the same happens to me whenever I run SETI on mine. Some GPUs emit a high-pitched squeal when under stress as well. It's irritating when it comes through your headphones, but it's completely harmless and nothing to worry about - I've run some form of DC project on my overclocked CPU for its five-year life and it's as strong as ever.