explain the workin of SONAR with simple diagram???? and expand SONAR??
SONAR
SONAR (acronym for Sound Navigation and Ranging) is an acoustic device that is installed in ships to measure depth, direction, and speed of underwater objects such as icebergs, sea rocks, shipwrecks, spy submarines, etc. It uses high frequency ultrasound for this purpose and works on the principle of echo. It consists of two main devices called transducer and detector.Transducer produces and transmits ultrasonic sound and detector receives the ultrasound that is reflected from the bottom of a sea or an underwater object. SONAR measures the echo of the ultrasound and calculates the depth or distance of underwater objects using the relation,
2d = v × t
Where d = Distance between the ship and the underwater object
v = Speed of ultrasound in water
t = Time taken by the echo to return from the object
This method of measuring distance is known as echo ranging.