I don't know but I REALLY irritated the guy next to me on a recent flight. I woofed down a can of Coke just before descent--I had a chest cold--and every few seconds I would feel the change in pressure release some carbonation from my stomach....up, up, and *belch!* This happened every couple seconds until we landed. Very embarrassing.
I think your problem also has to do with the change in pressure. It takes about 24 hours for something to completely go through the digestive system. Try not eating or drinking anything with "air" in it for 24 hours prior to your flight?