Infrasound is a type of sound that is thought to be inaudible for human hearing. It has long been blamed as a source for a list of ailments – from nausea and sleep loss to anxiety.
Wind turbines do generate infrasound, but so do lots of other common, harmless sources.
Infrasound is emitted by many natural sources from ocean waves and thunder to wind. It also comes from machine-made sources such as road traffic, air conditioning and machinery.
Infrasound emitted at the levels created by wind turbines has conclusively been proven to have no impact on human health.
The WHO has said: “There is no reliable evidence that infrasound below the hearing threshold produce physiological or psychological effects.”7
Extensive international studies have shown that there is no evidence that the presence of wind turbines increases levels of infrasound. And there is scientific consensus that infrasound at normal levels does not pose any threat to humans.
Overall, the benefits to human health that come from the reduction of air pollution by producing clean, renewable wind power far outweigh the perceived health threats from wind turbines.