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

Key QuotesWind Turbine NoiseThe Measurement of Low Frequency Noise at three UK Wind Farms, Department of Trade& Industry (DTI) Summary, 2006“…when wind farm noise is at its most intrusive, it is this aerodynamic modulation whichgives rise to their complaints associated with the operation of the wind turbines.” (48)….This measured level of modulation is greater than that expected... In these specific,high modulation conditions, the application of a penalty for the character of the noisemay be appropriate. Apply a 5dB correction if ……the noise contains distinct impulses(bangs, clicks, clatters, or thumps); or the noise is irregular enough to attract attention;”(59)NOISE-CON 2007 - Communicating the Noise Effects of Wind Farms to Stakeholders,Oct. 22-24, 2007“As shown in Figure 1, for a given level of noise exposure, wind turbines were found toproduce higher levels of annoyance than transportation noise sources were found toproduce. The graph of Figure 1 also suggests that the percent of people highlyannoyed increases more rapidly if exposed to wind farm noise.” (5) ….44-percent ofthe respondents living from 800 feet to ¼ mile of the wind farm stated that the turbinesare ‘causing a problem with noise.’ From approximately ¼ mile to ½ mile from thewind farm, the percentage of respondents indicating a problem with noise increased to52-percent.” (7)