1.5 kilometers Dr. Chris Hanning (UK) - Cape Cod Commission

Key QuotesWind Turbine NoiseAcoustic Ecology Institute, Special Report: Wind Energy Noise Impacts, 11/17/2009“…it is clear that the current boom in wind farm development could well backfire, forboth the industry and a clean energy future, if the current generation turbines are sitedtoo close to residences.” (3) …it appears that noise can be a significant issue in at leastsome situations when turbines are within about a half mile of homes (roughly 800m),with some impacts apparent up to a mile away. Some acousticians and healthprofessionals are encouraging setbacks of as much as 1.5 miles (just over 2 km).” (3-4)…All too often, wind developers tell local planning boards that the turbines will beinaudible, which is rarely the case.”Dr. Christopher Hanning…on Sleep disturbance and wind turbine noise, June 2009“The sleep, because it is broken, is unrefreshing resulting in sleepiness, fatigue,headaches and poor memory and concentration (Martin 1997), many of the symptomsof “wind turbine syndrome”. Arousals may be caused by sound events as low as 32dB(A) and awakenings with events of 42dB(A) (Muzet and Miedema 2005), well withinthe measured noise levels of current ‘wind farms’ and the levels permitted by ETSU-R-97.” (6-7) ….In my expert opinion, from my knowledge of sleep physiology and areview of the available research, I have no doubt that wind turbine noise emissionscause sleep disturbance and ill health.” (17)