Amplitude modulation of noise from wind turbines due to propagation through the atmosphere
At distances of several hundred meters and more, the noise from wind turbines is sometimes perceived as a "thumping" sound, with an amplitude modulation of the sound pressure levels that corresponds to the frequency of the rotation of the turbine. While some of these modulations can
be part of the emission, being caused by the turbine itself, such amplitude modulations can be also be caused by the propagation of the sound through the atmosphere. A mechanism for this is presented, as well as atmospheric conditions that will result in strong amplitude modulations at long
distances.
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Document Type: Research Article
Publication date: 21 August 2016
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