Infrasound, sound waves that nothing can stop

What do a wind turbine, an ocean swell, and a volcanic eruption have in common? All three emit infrasound, or sound whose frequency is below 20 hertz. These sound waves, which are wrongly considered to be inaudible, can travel around the Earth multiple times, and are of interest to both physicists and doctors. A closer look.

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Author: Redaction

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