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Adverse impacts of wind energy: Difference between revisions
Adverse impacts of wind energy (view source)
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==Noise== | ==Noise== | ||
Wind turbine blades sweeping a vertical air space of 1.5 to 2 acres (0.5–1 hectare) 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 to the different air pressures at the top and bottom of the blades’ rotation area. The passing of each blade by the tower | Wind turbine blades sweeping a vertical air space of 1.5 to 2 acres (0.5–1 hectare) 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 to the different air pressures at the top and bottom of the blades’ rotation area. The passing of each blade by the tower likely also contributes. | ||
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 travel farther without attenuation, but also penetrate 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> | 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 travel farther without attenuation, but also penetrate 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> | ||