explain sonar in brief ???????
Answers
Answer:
❤️hey here is your answer ❤️
Sonar (originally an acronym for sound navigation ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.[2] Two types of technology share the name "sonar": passive sonar is essentially listening for the sound made by vessels; active sonar is emitting pulses of sounds and listening for echoes. Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used before the introduction of radar. Sonar may also be used for robot navigation,[3] and SODAR (an upward-looking in-air sonar) is used for atmospheric investigations. The term sonar is also used for the equipment used to generate and receive the sound. The acoustic frequencies used in sonar systems vary from very low (infrasonic) to extremely high (ultrasonic). The study of underwater sound is known as underwater acoustics or hydroacoustics.
The first recorded use of the technique was by Leonardo da Vinci in 1490 who used a tube inserted into the water to detect vessels by ear.[4] It was developed during World War I to counter the growing threat of submarine warfare, with an operational passive sonar system in use by 1918.[2] Modern active sonar systems use an acoustic transponder to generate a sound wave which is reflected back from target objects.[2]
❤️hope it help you ❤️
Answer:
sonar An electrical impulse is converted into sound waves that are transmitted underwater. ... An example of sonar is a system wherein you send out sound waves and see how long it takes to bounce them back in order to try to find out how deep an area is in the Atlantic Ocean.