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Large Wind Turbines

November 4, 2003
Paul Gipe

Cruising World Noise Measurements


Cruising World Noise Measurements
Turbines Rotor Swept Rated SPL*
Tested Dia. Area Power @11 knots
  m m2 W dBA
Rutland 913 0.91 0.65 70 75
Ampair 100 0.92 0.66 50 78
Air 403 1.17 1.08 400 102
Windbugger 1.27 1.27 180 80
Fourwinds II 1.52 1.81 240 83
* 8 ft (2.4 m) from hub, 11 knots= ~13 mph, ~5.5 m/s
Source: Ed Sherman, New England Institute of Technology; in Cruising World, October, 1999

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