Adverse impacts of wind energy: Difference between revisions

Adverse impacts of wind energy (view source)

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 ==Noise==
+Wind turbine blades sweeping a vertical air space of 1.5 to 2 acres necessarily create noise as they thus remove energy from the wind to turn the generators. The gears and the generator also make noise as they turn. The characteristic pulsing noise of wind turbines is likely due the different air pressures at the top and bottom of the blades’ rotation area. The passing of each blade by the tower may also contribute.
+Furthermore, because the blades are mounted on towers hundreds of feet in height, the noise may be projected a great distance, particularly at night (owing to [[wikipedia:Inversion_(meteorology)|atmospheric inversion]] causing sound waves to bounce back down to earth) and particularly infrasound and low-frequency noise. The latter not only travels farther without attenuation, but also penetrates walls and windows and can even resonate with them.<ref>https://www.wind-watch.org/documents/acoustic-noise-associated-with-the-mod-1-wind-turbine-its-source-impact-and-control/</ref><ref>https://www.wind-watch.org/documents/methodology-for-assessment-of-wind-turbine-noise-generation/</ref>
+Because large wind turbines are necessarily erected in previously undeveloped places, the addition of this noise is especially intrusive, particularly at night.
+<references />
 :''See also:'' [https://www.wind-watch.org/documents/category/noise/?titles=on Wind Watch documents concerning noise]