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Question:
I was wondering if you could give a couple of examples of infrasonic sound to pass onto my students, thanks


Replies:
Lots of things produce infrasonic sounds, since infrasonic simply means having a frequency below the lowest frequency humans can hear (about 16 - 20 Hz) a few examples: explosions, thunder, elephants, and (I believe) whales Infrasonics are around us all the time just like infrared and ultraviolet light: we are just not aware of them without special instruments to detect the sound or light energies at frequencies we cannot perceive directly.

John Hawley


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