How often have you been beside someone who dries their regulator dust cap by blasting it with air from the cylinder?, maybe you do it yourself, personally i find it a terrible habit to be avoided and more so now after doing some research. Air released from a cylinder can be as high as 130 decibels in sound (decibel is a measurement of sound) 2 minutes exposure to 130db of sound begins to cause damage to the ear, imagine 30 divers doing it one after the other which is often the case on liveaboards or in other high density areas of divers, for only 10 seconds per diver this equates to 5 minutes more than double the time from the beginning... read more >>