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Investigations on Low Frequency Noises of On-Shore Wind Turbines
Open AccessTechnical Note

Determination of Acoustic Compliance of Wind Farms

The Acoustic Group, South Windsor 2756, Australia
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Acoustics 2020, 2(2), 416-450; https://doi.org/10.3390/acoustics2020024
Received: 4 April 2020 / Revised: 10 June 2020 / Accepted: 17 June 2020 / Published: 22 June 2020
(This article belongs to the Special Issue Wind Turbine Noise)
An issue exists around the world of wind farms that comply with permit conditions giving rise to noise complaints. Approval limits are normally expressed in A-weighted levels (dB(A)) external to residential receivers. The distance from the wind farm to residential receivers can result in difficulty in establishing the dB(A) contribution of the wind farm, as the overall noise includes background noise that can provide masking of the wind turbine noise. The determination of the ambient background at a receiver location (without the influence of the wind farm) presents challenges, as the background level varies with the wind and different seasons throughout the year. On-off testing of wind farms does not normally occur at high wind farm output and limits this approach for acoustic compliance testing of a wind farm. The use of a regression analysis method developed more than 20 years ago is questioned. Anomalies with respect to compliance procedures and the regression method of analysis based on real-world experience are discussed. View Full-Text
Keywords: wind turbine criteria; wind noise; ambient background level; regression analysis wind turbine criteria; wind noise; ambient background level; regression analysis
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Cooper, S.; Chan, C. Determination of Acoustic Compliance of Wind Farms. Acoustics 2020, 2, 416-450.

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