Infrasound

Infrasound refers to sound vibrations whose frequency is below 20 hertz. This means that the waves have a period greater than 0.05 seconds.

Infrasonic vibrations can occur as a result of earthquakes, volcanic eruptions, and explosions. They can also be caused by air or water movement.

In nature, infrasound is used to transmit signals over long distances. For example, whales and dolphins use infrasonic waves to communicate over distances of up to 100 kilometers.

Infrasonic weapons also exist. It is used to hit targets at a distance. However, infrasonic weapons are prohibited by international treaties and conventions.

In addition, infrasound signals are used in medicine to treat various diseases. For example, infrasound massage can help reduce muscle and joint pain.

Infrasound technology is also used in production to control the quality of materials and products. For example, ultrasonic instruments can be used to determine the thickness of metal sheets or to control the quality of welds.