http://legis.wisconsin.gov/senate/la...addenstudy.pdf
"Although the underlying mechanisms are not yet fully understood, when wind turbines are built near homes, it is undeniable that their noise causes a constellation of unwelcome effects, with varying degrees, on health, sleep, and quality of life.
Further study may reveal the cause/effect, dose/exposure relationships, but as these are
undetermined, the precautionary principle should apply in order to protect the public health.
Preventive proactive policy functions to preserve the public's health, whereas reactive palliative responses are often inadequate, not to mention, too late.
Although government agencies and the wind energy industry and their consultants contend that the adverse health effects are conjecture or negligible or 'mere' annoyance, one may also argue that their calculations are based on models that make unproven presumptions about what sounds are or are not annoying to people. Wind turbine noise calculations were not tested on subjects in field study scenarios.
Furthermore, leading acousticians disagree on the methodologies to
measure, analyse, predict, and prevent wind turbine noise. Current guidelines rely on calculations that are based on variables that result in imprecise and inaccurate predictions of actual wind turbine noise and how people living nearby perceive·the noise.
Therefore, wind turbines should not be sited near homes communities, or other sensitive facilities,
e.g., schools and residential homes for special populations, such as the chronically ill aged. The precautionary principal should apply."