Google Chrome has a built-in Flash Player, and ever since the new update causes a sound glitch to happen. Before the update, it never occurred, yet it's the SAME file. Honest. Newgrounds has also noted other problems with the new Chrome update regarding Flash: http://www.newgrounds.com/bbs/topic/1265535
So... you might want to use a different browser until Google fixes this, unless they're too busy figuring out what the hell to do with G+ now.