Infrasonic sounds are sound waves with frequencies lower than 20 Hz, which is below the range of human hearing.

Ground sensors like those used on the moon and Mars can measure seismic waves. Balloon-based pressure sensors can measure infrasound waves, a form of low-frequency waves in the atmosphere created ...

Additionally, a study examined the response of a plasma magnetospheric maser to atmospheric perturbations, demonstrating that external influences, such as infrasonic waves, can excite QP ...