Question

A) what is SONAR B) give 2 application of this technique C) draw the diagram to show it D) what is the principle of this technique E) why can we hear an echo in a small room

Answer 1

SONAR is a technique that uses sound waves to map or locate objects in the surrounding environment. The premise is quite simple: first, emit a cluster of sound waves in the direction of an object. While a few waves will bounce off it, the remaining waves will be reflected back in the direction of the emitter.

If you were to insert one end of a tube into an enormous sea and put an ear to the other, you would definitely look like a loon. However, you would also hear the faint groaning of ships and the singing of various animals far away in the vast depths of the ocean. Leonardo Da Vinci was the first person to perform this ingenious experiment (without the fear of being judged) and discovered this whimsical phenomenon. He had successfully implemented what we now call SONAR.

Sound Navigation And Ranging

SONAR is a technique that uses sound waves to map or locate objects in the surrounding environment. The technique isn’t something extravagant that humans have developed in recent years; it has been used by animals such as bats and whales for millions of years.

Bats flying at sunset bat

A bat flying while the sun sets. (Photo Credit: satit_srihin / Shutterstock)

The premise is quite simple: first, emit a cluster of sound waves in the direction of an object. While a few waves will bounce off it, the remaining waves will be reflected back in the direction of the emitter. With the knowledge of the speed of sound and the time that passed before the wave was retrieved, an adroit receiver can calculate the object’s distance from the emitter.

While Sonar can be implemented in the open air, it is known to be more effective in water. This is because sound waves tend to travel longer distances in water. Owing to Sonar’s remarkable range, whales can discern the shape and movement of objects the size of ping-pong balls from 50 feet away. They are known to rely on Sonar even more than sight to forage and track their kin.