write a short note on Sonar ?
urgent please
Answers
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Answer:
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SONAR is an acronym for Sound Navigation And Ranging. It is an acoustic device used to measure the depth, direction, and speed of under-water objects such as submarines and ship wrecks with the help of ultrasounds. It is also used to measure the depth of seas and oceans.
A beam of ultrasonic sound is produced and transmitted by the transducer (it is a device that produces ultrasonic sound) of the SONAR, which travels through sea water. The echo produced by the reflection of this ultrasonic sound is detected and recorded by the detector, which is converted into electrical signals. The distance (d) of the under-water object is calculated from the time (t) taken by the echo to return with speed (v) is given by 2d = v × t. This method of measuring distance is also known as ‘echo-ranging’.
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Answer:
Explanation:
SONAR is an acronym for the term ‘sound navigation ranging’. It is a technique that involves the usage of sound propagation for navigational purposes. It can also be used for the detection of distant objects and for communication with other objects. SONAR has a wide spectrum of underwater applications, including communication between submarines and navigation of submarines. The two types of technology that fall under the name ‘SONAR’ include passive SONAR (used to listen to the sounds made by underwater objects) and active SONAR (which involves the emission of sound waves and waiting for the echo to come back). The first person to use the concept of SONAR was Leonardo da Vinci who, in the year 1490, inserted a tube into the water in order to hear the sounds made by certain vessels.