The generation of random numbers has many uses (mostly in statistics, for random sampling, and simulation). Before modern computing, researchers requiring random numbers would either generate them through various means (dice, cards, roulette wheels, etc.) or use existing random number tables.
Yawning, swallowing or chewing helps open the small canal (Eustachian tube) which connects your middle ear in the inner side of the ear drum, and equalizes the pressure with the outer side and causes the sensation of ears popping when swallowing.
Thus causing the popping sensation when air suddenly rushes in or out of the tube. Dr. Eisenman says it's ok to try and equalize the pressure if your ears get uncomfortable. Eisenman: And the way you do it is by trying to get the eustachian tube to open and close, such as by swallowing or chewing on something. Or you can pinch your nose and try to push air actively back into the middle ears to do that. If you would like to pop a science question on us, call us at 1-800-WHY-ISIT. I'm Bob Hirshon for AAAS, the Science Society.