Here is the latest! It is so frustrating that the wind industry and Appalachian State keep denying that there are problems! Mr. Dennis Scanlin said any concerns were “bogus.” They are not bogus Mr. Scanlin!
Saturday, January 16, 2010
“I have worked personally with both Professor J.E. Ffowcs-Williams, and Dr. H.G. Leventhall, two of the foremost UK acousticians. Twenty to 30 years ago, I worked directly in collaboration with both on several low-frequency noise installations, thus gaining first-hand experience of the problems associated with low-frequency noise and infrasound. My actual time-on-site addressing low-frequency noise probably well exceeds either”—Malcolm A. Swinbanks, PhD
“Low frequency noise can induce feelings of discomfort and nausea, not unlike seasickness. Like seasickness, the sensitivity of different individuals varies enormously, some being immediately sensitive, while others can barely detect anything.
“I have stood beside two people on a site where low-frequency noise was present. One person said ‘I can’t really hear anything.’ The other said ‘I feel ill. I should like to leave.’ Both were reporting accurately; there can often be more than 12dB difference (a factor of 4) in the sensitivity of individuals to low-frequency noise. Given that for very low frequencies, 12dB represents the difference between just audible, and uncomfortably loud, it is clear that very real problems are experienced by some individuals, while others remain largely unaffected.
“It is important to emphasize that there does not yet appear to be a full understanding of how to assess low-frequency wind-turbine noise.
“So it is difficult to understand how it can be argued emphatically that there is no problem, when it is clearly reported that significant ambiguity still remains in assessing these effects.” (Click here for full text, posted with the author’s permission.)