infraäänelle

Infrasound refers to sound waves with frequencies below the lower limit of human audibility, which is typically considered to be 20 Hertz (Hz). While humans cannot consciously hear infrasound, it can be perceived through other bodily sensations and can be generated by a variety of natural and man-made sources. Natural sources include volcanic eruptions, earthquakes, avalanches, severe weather events like thunderstorms and tornadoes, and even ocean waves. Large animals such as elephants and whales are also known to produce and communicate using infrasound over long distances.

Man-made sources of infrasound are diverse. They include industrial machinery, wind turbines, large engines, explosions, and even the operation of certain vehicles. The study of infrasound, known as infrasound acoustics, is an area of scientific research that investigates its generation, propagation, and effects. Because infrasound can travel long distances with little attenuation, it has been used in monitoring for events like nuclear explosions. Research also explores its potential psychological and physiological effects on humans, though these are often debated and depend on intensity and duration of exposure. The detection of infrasound requires specialized equipment, such as sensitive microphones and digital signal processing techniques.