Monday, 9 December 2013

Wind turbines are quieter than a heartbeat, acoustical experts find
24 Sep 2013

One complaint voiced by wind turbine opponents is that the turbines create too much noise — even noise below the range of human hearing, known as infrasound. These concerns fuel claims about "Wind Turbine Syndrome," which advocates say is a medical condition that involves mental health problems, heart disease, and vertigo.

A study by an acoustic engineering group in Australia found that that infrasound generated by wind turbines is less loud than the infrasound created by a listener's own heartbeat. It found that wind turbine infrasound does increase as wind speed increases, but this is often masked by the natural noise of wind moving through the area.

The Association of Australian Acoustical Consultants said that "those investigations conclude that infrasound levels adjacent to wind farms are below the threshold of perception and below currently accepted limits set for infrasound."