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January 28, 2021

feature, Vermilion County, Wind Turbine

Wind Turbines: Sounds you can't hear can still hurt your ears...

BY JOHN KRAFT & KIRK ALLEN

ON October 1, 2014

From SCIENCE Magazine:

By Sarah C. P. Williams 30 September 2014 7:15 pm

A wind turbine, a roaring crowd at a football game, a jet engine running full throttle: Each of these things produces sound waves that are well below the frequencies humans can hear. But just because you can’t hear the low-frequency components of these sounds doesn’t mean they have no effect on your ears. Listening to just 90 seconds of low-frequency sound can change the way your inner ear works for minutes after the noise ends, a new study shows.

“Low-frequency sound exposure has long been thought to be innocuous, and this study suggests that it’s not,” says audiology researcher Jeffery Lichtenhan of the Washington University School of Medicine in in St. Louis, who was not involved in the new work.

Humans can generally sense sounds at frequencies between 20 and 20,000 cycles per second, or hertz (Hz)—although this range shrinks as a person ages. Prolonged exposure to (continue reading)...

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