WHO Environmental Noise Guidelines for the European Region: A Systematic Review on Environmental Noise and Effects on Sleep 22 Mar, 2018 | 23:39h | UTC WHO Environmental Noise Guidelines for the European Region: A Systematic Review on Environmental Noise and Effects on Sleep – International Journal of Environmental Research and Public Health (free) See also: WHO Environmental Noise Guidelines for the European Region: A Systematic Review on Environmental Noise and Cardiovascular and Metabolic Effects: A Summary – International Journal of Environmental Research and Public Health (free)