EE IS A MECHANIC WORKING IN OUR AREA ""C"" REPAIR SHOP. FOR MANY YEARS, OPERATORS HAVE COMPLAINED THAT THE FACTORY HORNS ON 992 LOADERS ARE NOT LOUD ENOUGH FOR THE MINING ENVIRONMENT. CONESEQUEN TLY WE HAVE INSTALLED AIR HORNS ON THESE MACHINES. A CO WORKER SOUNDED THE HORN OF A 992 IN THE BAY NEXT TO THE INJURED EE CAUSING PAIN AND RINGING IN HIS EARS.