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Resource Documents by Keith, Stephen

Keith, Stephen; et al.
Wind turbine low frequency and infrasound propagation and sound pressure level calculations at dwellings
Abstract – This study was developed to estimate wind turbine low frequency and infrasound levels at 1238 dwellings in Health Canada’s Community Noise and Health Study. In field measurements, spectral peaks were identifiable for distances up to 10 km away from wind turbines at frequencies from 0.5 to 70 Hz. These measurements, combined with onsite meteorology, were in agreement with calculations using Parabolic Equation (PE) and Fast Field Program (FFP). Since onsite meteorology was not available for the Health Canada study, PE . . . Complete article »

Michaud, David; Keith, Stephen; et al.
Self-reported and objectively measured health indicators among a sample of Canadians living within the vicinity of industrial wind turbines
This is the detailed description of the methodology used for the Health Canada/Statistics Canada “Wind Turbine Noise and Health Study”, the preliminary results of which are summarized at From the summary of results: The following were not found to be associated with WTN exposure: self-reported sleep (e.g., general disturbance, use of sleep medication, diagnosed sleep disorders); self-reported illnesses (e.g., dizziness, tinnitus, prevalence of frequent migraines and headaches) and chronic health conditions (e.g., heart disease, high blood pressure and diabetes); . . . Complete article »

Michaud, David; Bly, Stephen; and Keith, Stephen
Using a change in percentage highly annoyed with noise as a potential health effect measure for projects under the Canadian Environmental Assessment Act
(Abstract) Health Canada is in the process of developing a document, Guidance for Environmental Assessment: Health Impacts of Noise (Guidance) on how to assess noise impacts in environmental assessments. The guidance document is needed to assist Health Canada in providing consistent expert advice on the health effects of project noise, when requested under the Canadian Environmental Assessment Act (CEAA). Differences exist between various noise mitigation criteria used in environmental assessments from across Canada, Therefore, the first step for Health Canada . . . Complete article »

Keith, Stephen; Michaud, David; and Bly, Stephen
Proposal for evaluating the potential health effects of wind turbine noise for projects under the Canadian Environmental Assessment Act
Abstract: The Canadian Environmental Assessment Act (CEAA) requires certain projects with federal government triggers to undergo an environmental assessment before receiving federal government approval. On request under CEAA, Health Canada provides advice on the health effects of noise to responsible authorities for wind turbine projects. The advice that Health Canada provides on the health effects of noise is generally based only on well-accepted scientific evidence for a link between noise exposure and health. For quiet rural areas, in which annoyance . . . Complete article »

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