 Stageloaders (84-102 dBA), shearers (85-99 dBA), auxiliary fans (84–120 dBA), continuous mining machines (78–109 dBA), and roof bolters (92–103 dBA) represent some of the noisiest equipment in underground coal mines.Dragline oilers, dozer operators, and welders using air arcing were occupations with the highest noise exposures among surface coal miners.Coal mines had the highest hearing loss injury likelihood.