That's a good question for @MattHickman. Yes, there is a background wind sound. I don't think it's currently possible to turn it off completely without muting the volume, but maybe there's a way to do it that I don't know about. The wind sound is so quiet that I normally can't even hear it unless I have the volume up about 25% (though my hearing isn't the greatest). If I have music on it's inaudible. But it would be nice to be able to turn it off entirely.
I'd like to have a complete audio kill option as well. Usually listen to music, but when the sculpt is really pushing things, would be nice to have the option to kill unneeded calls to the sound card. Besides, silence is nice sometimes.