Noise is a serious health hazard, and if worker exposure is not eliminated or controlled, it can cause permanent hearing loss, physical and psychological stress, reduced productivity, and significant interference with communication causing further accidents and injuries. The Ontario Ministry of Labour has released a revised noise guideline in December 2016 to accompany Ontario Regulation 381/15. Regulation 381/15, effective July 1, 2016, sets out requirements for noise protection in all workplaces in the province.