Question

what are applications of infra sonic sound ​

Answer 1

Answer:

The sounds frequency lower than 20HZ are called infrasonic sound

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Answer 2

Answer:

People use this frequency range for monitoring earthquakes and volcanoes, charting rock and petroleum formations below the earth, and also in ballistocardiography and seismocardiography to study the mechanics of the heart. Infrasound is characterized by an ability to get around obstacles with little dissipation.