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There’s a sound so powerful… it can make people hallucinate. It’s called infrasound. Sound waves below the range of human hearing. You can’t hear it, but your body reacts to it. Infrasound is produced by storms, volcanoes, earthquakes, and even certain buildings. Research shows it can cause anxiety, fear, nausea, and sudden chills. Some people feel watched. Others see movement in the corners of their eyes.