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Because you seem to be having a unique experience with this, I think the following things are worth looking at, just as a bit of a check list.
Is anyone else having the same problem?
If you use other Headphones/speakers does the problem persist.
Does dropping the total volume help? (In game and in Windows Sound Manager)
The above three will help you identify where in the chain the static is coming from.
Question 1:
Yes? Problem with the game
No? Problem with your hardware/software
Question 2:
Yes? Headphones/speakers are damaged.
No? not your headphones/speakers.
Question 3:
Yes? The Sound card has a maximum amplitude that it can output, you are surpassing that, and as such your sound card (or other sound output device) is not powerful enough to drive your speakers/headphones at the volume you are trying to achieve. (Fix and then test Question 2 again, your light headphones, will behave differently from your heavy speakers)
No? Something between the software and your hardware is not playing fair.
If the problem is unique to this game, blame the game! If it's happening for more that just this game (try running some others at full volume (max it out)) then blame the drivers/hardware
If you're using a built in sound device (can still do if you don't mind replacing your existing PCI card):
Find a local tech person and ask them if they have a spare sound card (These are practically junk PIC cards that most people never need/use so they just pile up.) Give him a $20 and ask him to throw it in your PC. (PS: Woot upgrade )
See if that fixes the issue, if it does, blame the original card for having limited scope, bandwidth, power, or just wearing out.
If this does not fix the issue, (New Hardware, New Drivers, Different Headphones) Then the only options left are 'Your game' and 'Your Operating System' If it's windows, blame windows. Else blame the game.
Side notes:
"win+r" -> "dxdiag" has a sound section that can give you some details about your sound device.