Documents filed under Noise
The Acoustic Group’s Principal, Mr Steven Cooper, was commissioned by wind developer Pacific Hydro to undertake an investigation into “noise” emitted at the Cape Bridgewater wind energy facility. Symptoms reported by residents living near the turbines include severe nausea, headaches, ear pressure, inability to concentrate, and severe and debilitating sleep problems. The primary document explaining the study and the results can be downloaded from this page. The full study, including six appendices, can be accessed by clicking the links on this page.
The authors of this paper conducted an extensive literature review of scientific articles that address the association between wind turbine noise exposure and any suspected health-related outcomes. The abstract of their findings is provided below. The full paper can be accessed by clicking the links on this page. A second link on this page includes three tables listing the health studies reviewed by the authors.
The aim of this study was to investigate the time dependent nature of unweighted wind farm noise and its perceptibility, with a focus on infrasound. Measurements were carried out during shutdown and operational conditions and results show that wind farm infrasound could be detectable by the human ear although not perceived as sound. The abstract and conclusion of the paper can be read below. The full paper can be accessed by clicking the link(s) on this page.
This important study examines the noise emissions of an operating wind facility during periods when the turbines are generating electricity and when the turbines are shut off. The abstract of conclusion of the study are provided below. The full study can be accessed at the links on this page. The study found "consistent and significant differences in noise spectra ...for the shutdown and operational cases, particularly for frequencies below 100 Hz. These differences can be observed at distances up to 8.7 km from the wind farm.
In this paper, William K.G. Palmer discusses how interior room shape and size contribute to turbine noise complaints when wind turbines are sited nearby. The abstract of the paper is provided below. The full paper, with presentation slides, can be accessed by clicking the link(s) on this page. Mr. Palmer presented his findings at the October 2014 Acoustical Society of America proceedings.
In this study, neurobiologist Markus Drexl and others at the Ludwig Maximilian University in Munich, Germany, examined the effects of low frequency noise on human hearing. The found that after short bursts of LF sound the ear showed signs that, over time could damage hearing. The introduction and conclusion of the study's report are provided below. The full report can be accessed by clicking the links on this page.
This study examines the impact of wind turbine sound emissions and the potential of masking of biological signals between species present in desert habitats. Turbine noise appear to increase the ambient noise level to the point where bioacoustic activity could not be detected. An abstract and summary of the report is provided below. The authors have not yet released the full report.
Acoustician, Steven Cooper, has been asked to measure noise emissions at the Cape Bridgewater wind energy facility in Australia following years of noise complaints since the project was placed in service in 2008. Mr Cooper has tested inside three homes near the wind facility over eight weeks, including a two-week shutdown of the turbines. His preliminary report can be accessed by clicking the link(s) on this page. His initial findings are provided below.
This letter written by Dr. Nina Pierpont responds to concerns about a wind energy facility proposed to be built in Turkey. This letter presents a comprehensive discussion of what is known today as Wind Turbine Syndrome. A short excerpt of the letter is provided below. The full letter can be accessed by clicking the link on this page. In the letter, Dr. Pierpont makes specific reference to the work of Dr. N. D. Kelley on the issue of low-frequency noise eminating from operating wind turbines.
This report describes the results of full spectrum acoustic monitoring conducted at a number of homes located between 2 km out to nearly 10km from the Waterloo Wind Energy facility. This monitoring was independent of the that conducted by the South Australian Environment Protection Authority (SA EPA) and was requested by Mrs Mary Morris and other concerned residents in the Waterloo district. The monitoring occurred during the period of the South Australian EPA Acoustic Survey, conducted in mid 2013. The conclusions of the monitoring are provided below. The full report can be accessed by clicking the link(s) on this page.
This important paper written by Drs. Alec Salt and Jeffery T. Lichtenhan, both Professors of Otolaryngology at Washington University in St. Louis, examines the many ways by which unheard infrasound and low-frequency sound from wind turbines could distress people living nearby. The introduction and conclusion of the paper is excerpted below. The full paper can be accessed by clicking the link(s) on this page.
This informative response letter provides useful detail on the work of Mariana Alves-Pereira and her study of how wind turbine infrasound impacted the health of family members living near a wind project. Due to health concerns, the Supreme Court of Justice in Portugal ordered in 2013 that four of the wind turbines, initially erected in 2006, be removed. A portion of the document is provided below. The full letter can be accessed by selecting the links on this page.
Dr. Bruce Rapley filed this response letter with the Australian Medical Association (AMA) objecting to the AMA's position on wind turbine noise that the "available Australian and international evidence does not support the view that the infrasound or low frequency sound generated by wind farms, as they are currently regulated in Australia, causes adverse health effects on populations residing in their vicinity." The concluding paragraphs of the letter are posted below. The full letter can be accessed by clicking the links on this page.
This important paper prepared by acoustics expert Les Huson examines the permitted noise limits imposed on the Flyers Creek wind energy facility in the context of actual infrasound noise emissions from other operating wind projects. Mr. Huson determines that the Flyers Creek project will not satisfy the noise conditions or the South Australian EPA Environmental Noise Guidelines for wind energy facilities. Excerpts of the paper are provided below. Readers are encouraged to download and read the full paper by clicking the link on this page.
This important report prepared by noise acoustician, Robert Thorne PhD of Noise Measurement Services in Australian, provides a comprehensive explanation of our "state of understanding" regarding wind turbine noise and the effects of the noise on communities. This report is updated from a previously released version of Dr. Thorne's study.
The Vermont Public Service Board held a prehearing conference on January 8, 2014 to discuss opening an investigation into the issue of appropriate sound standards applicable to facilities constructed pursuant to 30 V.S.A. §§ 248 and 219a. This inludes wind energy facilities. In this order the Board established a process for conducting the proceeding, as well as a proposed scope of issues to be examined through the investigation. A portion of the order is provided below. The full order can be accessed by clicking the link(s) on this page.
Ted Hartke, his wife Jessica and their two children, Phillip (age 9) and Sophia (age 6) have abandoned their home in Vermilion County, Illinois due to turbine noise. This testimony was delivered to the Boone County Illinois county commissioners on May 28, 2013 as the county considered a wind ordinance that would permit wind development. This testimony predates Mr. Hartke and his family leaving their home. A portion of his testimony is provided below. His full testimony can be accessed by clicking the link on this page.
This paper discusses Blade Passing Frequency (BPF) infrasound and its harmonics. Some results on Low Frequency Noise at discrete amplitude modulated frequencies of about 20 Hz plus harmonics, is briefly discussed as a side effect of the spinning mode generation mechanism. A portion of the paper is posted below. The entire paper can be accessed by clicking the links on this page.
Canadian health professionals Roy D. Jeffery, MD, Carmen M.E. Krogh, BScPharm, and Brett Horner, BA, published this peer reviewed paper which examines current literature on the impact of wind turbine noise emissions and the impact on residents nearby. The introduction and conclusions of the paper are provided below. The full paper can be accessed by clicking on the links on the page.