Question

Examples of inaudible sound

Answer 1

The audible frequency of a human ear is between 20hz to 20000hz

So any sound frequency which will be either less of more than the given range would be inaudible

For eg - Infrasound-  the way whales,elephants ,etc communicate

Ultrasound - can be used to detect submarines or ships by casting a frequency higher than 20khz

(Hope this helped ya)