pike51 This is why the slightest sound bothers some players. It's completely quiet and during concentration, even the slightest sound becomes amplified.
Reminds me a story from my father from years ago. He had a typical Saturday morning game with some buddies every week, and they had the usual $1 Nassau on the line per hole. Depending on how he was playing, he'd either be up $5 or $10, or down. He always kept spare change in his pocket for when he was down. He'd go fishing for change right in the backswing of his opponent's putt. Inconspicuous enough not to be complained about, but conspicuous enough to the opponent to distract him enough to throw off his putt.
The only reason my father mentioned it to me was in the caveat of, "should you ever be in a match and you are down...because this little trick works every time."
Keep in mind I was 12 or so at the time, and I made a mental note. Play a round with me and if there are sudden noises or distractions it doesn't faze me in the least. I took my father's lesson and applied it to my own game. Granted, I have bigger issues over 1 foot putts then distracting noises.