Infrasound will interfere with the normal function of human nervous system and endanger human health. A certain intensity of infrasound can make people dizzy, sick, vomiting, out of balance and even depressed. Because infrasound will do harm to human body, many countries in the world clearly list it as one of the public hazards.
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Infrasound waves are characterized by wide sources and far propagation, which can bypass obstacles and spread far. The sound frequency of infrasound is very low, below 20Hz, but the wavelength is very long and the propagation distance is very long. It travels farther than ordinary sound waves, light waves and radio waves.
For example, infrasound with a frequency lower than 1Hz can spread thousands or even tens of thousands of kilometers away. Infrasound waves have strong penetrating power, which can not only penetrate the atmosphere, seawater and soil, but also penetrate solid reinforced concrete buildings.