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Credit:  www.barnstablepatriot.com 24 June 2011 ~~

The June 6 Falmouth selectmen’s meeting missed the major wind turbine irritant. The HMMH consultants highlighted their A-weighted sound study and Steven Clark, Executive Office of Energy and Environmental Affairs, said Falmouth’s approach was “right in line” with the administration’s policy. Both represent a waste of Falmouth time and money if NASA’s Technical Paper to the U.S. Department of Energy Wind – HydroOcean Technologies Division (1990) carries weight.

A-weighted sound pressure levels de-emphasizes lower frequencies in evaluating the effects of noise. The more appropriate measure, dB(G), specifically emphasizes lower frequency evaluation (MassDEP, are you listening?). The effect of a turbine wake may take 16 rotor diameters for recovery to the initial free-air flow (Wind Turbine Wakes Control and Vortex Shedding [2004]. This represents a 4304’ around Falmouth’s utility sized turbines since each individual machine is an omnidirectional source.

The Environmental Protection Agency in Denmark has developed criteria for low frequency and infrasound (not just for wind turbines) of 85 dB(G), explicitly allowing a 10 dB factor for people more sensitive than the norm. Maybe it’s time Falmouth (let alone county and state) follow Denmark’s lead and ask questions addressing the more accurate problem!

Mark Cool

West Falmouth

Source:  www.barnstablepatriot.com 24 June 2011

This article is the work of the source indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.

The copyright of this article resides with the author or publisher indicated. As part of its noncommercial effort to present the environmental, social, scientific, and economic issues of large-scale wind power development to a global audience seeking such information, National Wind Watch endeavors to observe “fair use” as provided for in section 107 of U.S. Copyright Law and similar “fair dealing” provisions of the copyright laws of other nations. Send requests to excerpt, general inquiries, and comments via e-mail.

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