I get it. I really do. Advertisers help fund this website. I even understand having an advertisement flash up before you get to the website. But with sound?! C'mon, guys!
It sounds like a warbled jet engine. And, my God, is it LOUD! I open your website at least once a day and I'm serious when I say I have no clue what's being advertised - it's become a mini game: "how fast can I click the Continue to MaximumPC link so I don't have to hear that dreaded racket."
At least be considerate and make the sound an option I have to enable.