what are the two practical uses of echo?
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Echo which was once confined to a scene where a person shouts facing a hilly terrain receives back his/her “shout” after a certain time has been subjected to various methods of research under Sound & Acoustics section. Few of the applications are:
Civilian Applications
Hydro-graphic studies
The hydro-graphic studies which are performed to measure depth of large water bodies like seas or oceans. The time taken for a sound wave to reach the seabed and bounce back as an echo to the ship helps in calculating the depth of water body at that location. Similar instruments like these are also used for discovery of marine life (using passive sonars), shipwreck, lost(underwater) cities and even minerals.
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Civilian Applications
Hydro-graphic studies
The hydro-graphic studies which are performed to measure depth of large water bodies like seas or oceans. The time taken for a sound wave to reach the seabed and bounce back as an echo to the ship helps in calculating the depth of water body at that location. Similar instruments like these are also used for discovery of marine life (using passive sonars), shipwreck, lost(underwater) cities and even minerals.
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