In mining and construction, 2 out of 3 workers will experience hearing loss by the time they are 50. Most of it is due to the use of heavy equipment (think jackhammers and heavy drills), the drilling of rock and the confined work environment. What is particularly alarming is that the ability to hear well is essential to maintaining standards of safety – which, if jeopardized, can put workers in such extreme environments in a life threatening situation.