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Resource Documents by Stigwood, Mike

Stigwood, Mike; Large, Sarah; and Stigwood, Duncan
Audible amplitude modulation – results of field measurements and investigations compared to psycho-acoustical assessment and theoretical research
In the UK the cause of amplitude modulation (AM) and the ability to predict its occurrence is considered abstruse by many. Few have experienced or measured AM and yet conclusions are frequently made asserting that it is rare and that any action to counter its effects is limited by minimal knowledge surrounding its nature and cause. This paper aims to advance current knowledge and opinion of AM. Methods used to successfully investigate AM are confirmed. AM should be measured during . . . Complete article »

Stigwood, Mike
IOA good practice guide, excess amplitude modulation and the failure of wind farm noise controls
In August 2013 at the 5th International Conference on Wind Turbine Noise in Denver, we presented extensive research which amongst other things identified that excess amplitude modulation is common and the main noise problem and source of annoyance caused by wind farms. Unbeknown to me prior to the conference, a major Japanese study looking at 34 wind farms had also concluded AM was common and warranted controls similar to those I have previously promoted with small peak to trough values . . . Complete article »

Stigwood, Mike
Effect of a common wind shear adjustment methodology on the assessment of wind farms when applying ETSU-R-97
Executive summary This research paper has been commissioned by MAS Environmental Ltd. It challenges many of the commonly accepted assumptions on the influence of wind shear on wind turbine noise introduced by an article published in 2009. The article outlined changes to the assessment of wind shear reasoning that by altering background noise levels for wind shear, permitted turbine noise limits would be lowered. The 2009 article method for assessing wind shear was not based on research and was developed . . . Complete article »

Stigwood, Mike
Evaluation of Noise Impact Assessment
Evaluation of Noise Impact Assessment (Section 11 page 60) submitted as part of the ADAS (UK) Ltd Environmental Appraisal for the Proposed wind cluster Sedborough Farm Parkham (Planning application number: 1/0242/2008/FUL) by Mike Stigwood, FRSH, MIOA of MAS Environmental 10th May 2008 2.1 The ADAS UK report for this site contains inadequate information to reach an informed decision because a full Environmental Statement based on a properly conducted EIA has not been included with in the planning application. 2.2 I . . . Complete article »

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