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Review of the evidence on the response to amplitude modulation from wind turbines  

Author:  | Noise, Regulations, U.K.

This review was commissioned by the Department of Energy & Climate Change (DECC) in spring 2015 and finalised before DECC became part of the Department for Business, Energy and Industrial Strategy in July 2016.

The research has reviewed the evidence on the response to amplitude modulation (AM) in relation to wind turbines. It was undertaken by a research team lead by WSP Parsons Brinkerhoff, who are responsible for the overall editorial content of the report, and supported by three independent external reviewers.

The review considered the robustness of relevant dose-response relationships and how, in a policy context, the level(s) of AM in a sample of noise data should be interpreted. In particular, it considered at what point AM causes a significant adverse impact and has recommended how excessive AM from wind turbines might be controlled through the use of an appropriate planning condition.

The final report addresses comments raised by three peer reviewers, appointed by DECC. The reviewers, from Denmark and the Netherlands, are experts in noise and health.

While this research does not represent planning guidance, BEIS encourages developers and planning authorities in England to consider this research when determining if an AM condition would be appropriate.

The contractor worked closely with the Institute of Acoustics’ AM working group, who in August 2016 recommended a preferred metric and methodology for quantifying and assessing the level of AM in a sample of wind turbine noise data [click here for review from the Independent Noise Working Group].

Download: “Wind Turbine AM Review Phase 1 Report”

Download: “Wind Turbine AM Review Phase 2 Report”

This article is the work of the author(s) indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.

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