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Recent Advances in Wind Turbine Noise Research
Open AccessArticle

Investigations on Low Frequency Noises of On-Shore Wind Turbines

1
Stuttgart Wind Energy (SWE), University of Stuttgart (USTUTT), 70569 Stuttgart, Germany
2
Institute of Soil Mechanics and Rock Mechanics (IBF), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
*
Author to whom correspondence should be addressed.
Acoustics 2020, 2(2), 343-365; https://doi.org/10.3390/acoustics2020020
Received: 4 May 2020 / Revised: 20 May 2020 / Accepted: 24 May 2020 / Published: 26 May 2020
(This article belongs to the Special Issue Wind Turbine Noise)
The expansion of renewable energy usage is one of the major social tasks in Europe and therefore requires acceptance and support from the population. In the case of onshore wind turbines, the complaints of local residents are often interpreted as infrasound disturbances conceivably caused by wind turbine operation. To improve the acceptance for wind energy projects, national standards and regulations need to incorporate such low frequency effects. This contribution presents long-term acoustic measurement data of low frequency noise recorded directly near wind turbines (emission) and inside of residential buildings (immission) with the objectives to identify the signal characteristics and main influential parameters. Different locations (wind farm and individual turbine), wind conditions, and time ranges are evaluated. It is shown that various frequency content below 150 Hz (harmonics of blade passing frequency, etc.) is connected to the rotation of the rotor blade and the operation of the generator. Furthermore, stable atmospheric conditions are determined to be of high importance for the transmission of the characteristic signals. For future research, this work also serves as an example for low frequency sound pressure data during operation and shutdown of wind turbines. View Full-Text
Keywords: wind turbine sound; low frequency noise; atmospheric stability; long-term measurement wind turbine sound; low frequency noise; atmospheric stability; long-term measurement
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Blumendeller, E.; Kimmig, I.; Huber, G.; Rettler, P.; Cheng, P.W. Investigations on Low Frequency Noises of On-Shore Wind Turbines. Acoustics 2020, 2, 343-365.

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