Well, in my case it shouldn't be about changes: I had the problem every version I tried. ^^
However, I have done the following: Setting "Using high quality resampling" activated -> no change.
Changed Audio Device from "Microphone (High Defintion Audio Device)" to "Standard" -> no change. Well, got slightly worse I feel.
Used the audio port at my case -> no change. (Used direct motherboard port before.)
Deactivating Audio Device -> yay, no static! :P
What gets my thinking is that I use voice a lot, mainly Skype and Teamspeak. I have never heard any complaints about me producing background noices like a static. So I would think that it's not my hardware.