Question

give some uses of echo

Answer 1

Uses of echo are:

Civilian Applications

Hydro-graphic studies

Detection of Gases in mines

Military Applications

Answer 2

Echo: ...

*)) Since bats cannot see from their eyes, so they use the technique of echolocation to locate their ways. ...

*)) This technique is also used to find the depth of sea or distance of submarines.

*)) It also helps to estimate the distance or hills and mountains.

*)) This technique is also very helpful in the medical field as well.