Taken from Suite101 article:
According to the National Sleep Foundation, NSF, almost 90 million American adults suffer from some type of snoring disorder. Of those adults, 37 million suffer from snoring conditions on a regular basis. Although snoring most often affects overweight men, it can affect both sexes regardless of weight. Understanding causes of snoring and seeking treatment can help minimize health risks associated with the condition.
Causes of Snoring
During sleep, throat muscle relax and your tongue moves to the back of the throat. When you breathe in and out, a vibration results. The loudness of the vibration varies, though the Andrew J.M Prichard of the Royal Shewsbury Hospital reports snoring noise can be as loud as 110 dB, the equivalent to a jet plane approaching.