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Acoustic noise measurements on wind turbines performed in theframe of JOU2-CT92--0233
Gepubliceerd door: Publicatie datum:
ECN 1995
ECN publicatienummer: Publicatie type:
ECN-C--95-112 ECN rapport
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23  Niet beschikbaar.

Acoustic noise measurements have been performed on three commercial windturbines ranging from 550 to 1000 kW. The measurements have been performed with the standard ground board technique and also with an acoustical parabola. Special attention was paid to the influence of the blade pitch angle on the noise production and to the distribution of the noise production along the rotor blades. All results are available for validation of WT-noise models. One of the results is a rule of the thumb for the dependence of the total sound level to the blade pitch angle: -1 dB(A)/degree. 19 figs., 5 tabs.

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