This is the required expression to determine the distance of the object from the ship. V = Total distance covered by the wave / Time taken Therefore, the speed of the sound in this case is defined as:

If d is the distance from the object and the ship then the total distance covered by the wave from emitter to receiver is 2d. Let’s consider an example: A ship emits ultrasonic waves in water using the emitter and receives a wave back after time t, and we know the speed of sound in water is v.

Determination of the depth of sea using SONAR

Ultrasonic Waves: Ultrasonic waves or ultrasound are those sound waves that have a frequency greater than 20kHz (or 20,000 Hz).

Receiver: A receiver, sometimes also called a detector is a device that detects and receives the echo coming from the transmitted waves coming from different objects and analyses them to find the distance of the objects and many more such things.

Emitter & Transmitter: An emitter or transmitter is a device that produces ultrasonic sound waves and sends them to different directions of the ship or submarines.

The ultrasonic waves are then converted into electrical signals, which are studied to determine underwater conditions and obstacles.īelow defined are the terms related to the working of the SONAR: As a result, the receiver collects these waves. These waves are reflected by objects or the seabed after they strike. Waves pass through water and hit objects submerged or on the seabed. Ultrasonic waves or ultrasound are generated by the transmitter. The whole device has been loaded into the ship. A transmitter and receiver are used in SONAR techniques. So, it serves for plenty of uses but let’s first understand the working of SONAR. Submarines also communicate with the help of SONAR and during wars military ships and submarines and detect underwater torpedo and missile attack with the help of SONAR. It is generally used by ships, submarines to detect underwater objects like rocks, icebergs which causes serious risk to the ships. SONAR is a process of communicating or detecting objects underwater. SONAR stands for Sound Navigation and Ranging.

ISRO CS Syllabus for Scientist/Engineer ExamĪlso, a special device called SONAR uses ultrasonic sounds which are useful to measure the distance, direction, speed, and other various aspects of underwater objects or bodies.

ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.

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