Snoring is one of the signs of a more serious sleep disorder. Snoring is the harsh sound you hear when a snorer inhales during sleep. The noise occurs when the soft palate and uvula vibrate against the back of the throat or the base of the tongue.
As you fall asleep, the soft tissues at the back of the throat, the muscles that line the airway, and the tongue muscle all relax. As this occurs, the tongue drops back into the airway which causes it to narrow. As air passes through this narrower airway, it moves faster and causes the tissues to vibrate against each other, which creates a rattling or snoring sound.
Chronic snoring itself may actually be a cause of some cases of sleep apnea. Over time the vibration and the increased pressure against the upper airways as snoring people inhale may cause the soft palate to lengthen. This stretched palate is more prone to collapse and obstruction.