Documents filed under Noise

Can wind turbine sound that is below the threshold of hearing be heard?

Pma040063_schomer_thumb This paper by acoustics expert, Paul Schomer, explains how noise at very low frequency levels can be heard. The fundamental issue is: Can we hear slowly surging or pulsating sounds for which the LEQ spectrum is below the threshold of hearing, where "slowly" means that the pulses come at a rate that is no faster than about 4 pulses per second? The short answer is yes, and the longer answer is that this effect is a function of the spectral content and becomes more-and-more prominent as the spectral content goes lower-and-lower in the audible frequency range.
1 Jun 2013

Portuguese Supreme Court orders 4 wind turbines removed

This important ruling by the Portuguese Supreme Court determined that noise emissions from a four turbine facility had resulted in severe impacts on a family living and working nearby. A lower court recommended that the turbines suspend operations from dusk to dawn but the Supreme Count found this decision was unacceptable since the turbines made noise during the day. The court ordered suspension of the total operation of wind turbine nos. 1, 2, 3, and 4 both day and night and the defendant, therefore, remove them. The defendant was also ordered to pay the plaintiffs as compensation the sum of thirty thousand euros. A portion of the ruling is provided below. The full ruling can be accessed by clinking the link(s) on this page.
30 May 2013

Public health effects of siting and operating onshore wind turbines

19085692_fr_thumb In this scientific policy advisory report, the Superior Health Council of Belgium answers questions on the impact on health and well-being of siting wind farms in residential areas, placed in a context of sustainable development. The Superior Health Council formulates general recommendations as well as recommendations linked to specific physical environmental factors in order to develop onshore wind energy in a socially acceptable way, taking a quality of life perspective.
3 Apr 2013

Response to article by S. Cooper, “Wind farm noise - an ethical dilemma for the Australian Acoustical Society?”

2013_41_1_tumneyletter_thumb This letter by acoustician, Ray Tumney, addresses a consistent resistance by the Australian Acoustical Society to address the problem of wind turbine noise emissions. A portion of his letter is provided below. The entire letter can be accessed by clicking on the link at the bottom of this page. Mr. Tumney's letter supports comments by acoustician Stephen Cooper's document on this issue ( ).
1 Apr 2013

Vestas Policy on Noise from Wind Turbines

Exh_alb-rj-3_thumb Vestas recommends relative noise limits that take into account local background noise levels (where new wind turbines are sited near existing ones, already present turbine noise should not be calculated as part of the background noise).
10 Mar 2013

Ruling on Saddleback Ridge Wind noise levels

13me25fr_thumb In this important ruling by the Maine Supreme Judicial Court, the court found that a proposed wind project that was accepted for review by the State prior to more restrictive nighttime sound emissions limits being adopted, would still be subject to the new sound limits. The full ruling can be accessed at the link below.
5 Mar 2013

US-EPA Shuluuk Wind DEIS comments

Usepa-shuluuk-wind-deis-comments3-4-13_thumb The US EPA submitted comments on the Draft Environmental Impact Statement (DEIS) prepared for the Shu'luuk Wind Project proposed for the Campo Indian Reservation in San Diego County, California. An excerpt of the comments is provided below including EPA's concerns about infrasound and the potential impact on human health. The full submission can be accessed by clicking the link on this page. This project was officially withdrawn from consideration.
4 Mar 2013

Fairhaven Wind letter: Turbine noise studies tainted

Lettertokenkimmellreoctober15samplingissue_thumb The wind developer for Fairhaven Wind, two industrial-scale towers built near residences, has admitted that the sound survey conducted on October 15, 2012 was tainted due to one of the turbines, while still spinning, was not producing power. The developer insists human error was the cause but claims the no intent to artificially reduce the sound levels. The State of Massachusetts has ordered the results be discarded and for further studies to be conducted.
28 Feb 2013

Critique of South Australian EPA study on Infrasound Levels New Wind farms and other Environments

Cooper-critique-resonate_thumb Dr. Steven Cooper, an Australian acoustician with considerable experience measuring wind turbine sound emissions, prepared this important and detailed critique of a study sponsored by the South Australia EPA on low-frequency noise. The SA EPA report insisted that infrasound emitted by wind turbines was not different from infrasound from other sources in the environment. Dr. Cooper exposes the fatal flaws in the EPA's methodology for surveying the sound. Excerpts of his critique are provided below. The full report can be accessed by clicking the link at the bottom of this page.
26 Feb 2013

"The biggest government sponsored fraud in the history of our country"

120213_alby_schultz_renewable_energy_hansard_thumb The following speech was given on the floor of the Australian Parliament, House of Representatives, by the Member for Hume, Alby Schultz. Mr. Schultz addresses the failure of the Waubra wind farm and others to operate within the limits of their permits, the high cost and inefficient operation of wind turbines and, what he deems fraudulent issue of RECs to shell companies overseas.
12 Feb 2013

Grey Highlands 2012 wind turbine noise survey

Grey_highlands_plateau_noise_20130131_thumb New scientific measurements reveal that industrial wind turbines (IWTs) in Ontario routinely exceed acceptable noise limits set by Ministry of Environment (MOE) guidelines. The data show that when wind turbines are present, the associated sound pressure levels are repeatedly higher than government guidelines permit during the day, evenings and late at night.
3 Feb 2013

Wind Turbine noise complaint predictions made easy

Ambrose-randchart_thumb This straightforward, easy to understand analysis by acousticians Stephen Ambrose and Robert Rand provide insight in to predicting whether wind turbine noise will result in community complaints. The report has four parts. Part 1 is shown below. The full report can be accessed by clicking on the links at the bottom of this page.
28 Jan 2013
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