Infrasonido

The video explores the concept of infrasound, a low-frequency sound below human hearing. It explains how infrasound can cause ghostly sensations and is produced by natural and man-made sources like volcanoes and trucks. Elephants use infrasound to communicate over long distances. Although humans can't hear it, we can feel its vibrations, which might explain certain eerie feelings.

What sensation might humans feel that could be related to infrasound?

Why might someone feel scared when they detect infrasound?