“The frequency range of the infrasounds differ from waves such as sound emitted from other types of rotating machines, James said.
“Instead, they have large spikes of (peaks or crests) that are as much as 100 to 1,000 times higher in pressure than the pressure in the valleys between the spikes,” said James. “While the average sound pressure level of the tones may not appear to be very significant, it is the peaks of the pressure waves that are significant.”
Elaine Blaisdale — Cumberland Times — November 30, 2014
GLENCOE, Pa. — Low-frequency sounds can be detected in houses as far as a mile from wind turbines, an expert said.
Rick James, an acoustic engineer, said infrasounds are in homes located near the Twin Ridges Wind Farm.
Twin Ridges, located on the Big Savage Ridge area near the Maryland-Pennsylvania border, went into operation in late 2012.
James tested the infrasounds in a house that belongs to Tammy McKenzie and her husband Joe – who say they live in the “dark, deep depths of hell” beneath the shadow flicker, high- and low-frequency sounds that emit from the wind farm’s turbines.
“The tests at the McKenzies showed the characteristics I have found in homes of people who not only had adverse (health) reactions, but whose reactions were strong enough to make them decide to move if they find a home buyer or in some cases just vacate the home and move elsewhere,” said James.
In other areas, such as the Shirley Wind utility in Brown County, Wis., where more extensive testing has been conducted, folks reported adverse health effects including the sensation of moving while being still and pressure in the head, James said. (Continue reading, here….)