Show mouth kept open to protect ear brunn that an explosion may result in se rious injury to the human ears Is a well known duct act Gu gunners inkers often open their mouths to protect their ear drums while bring large guns says a 9 writer in the pathfinder magazine agAzIne Il when the mouth Is open the air waves bet in 1111 motion by the discharge of the gun enter the throat as well as the ears consequently the sudden pressure against the outside of tile the drums drum 9 Is counteracted by un 1111 equal pressure against the inside such however Is not the hie practice in the united states navy slen ilea working in the turrets tire are well protected from concussion those in the more exposed positions usually use pled gets of cotton in their ears to protect the drums some use patent ear stoppers such as are manufactured by various commercial firms although special ear protectors and cotton are arc also used us edat at the coast artillery tn target practices it Is a custom fr for tile personnel taking part to orien open their dumiot tile the actual bring of the hie guns in order that the pressure on 11 the ear drums may be equalized the men ulso also stand on their toes to bellee the body as much as possible vl of the eftekh of the explosion |