I snore during sleep.. I have tried recording it several times and I've observed that the snoring sound comes from the nose and not from the mouth. Mouth remains closed during sleep and as sufficient air is not coming in the nose, may be, resulting in nose applying excess pressure while inhaling.. which results in very loud noise. When I was born and till the age of 10 years I used to breathe using mouth only as nose was more or less blocked due to pneumonia history during birth.. Now I breathe using nose only but the breaths are relatively loud and heavy even during day time..