Is this page helpful?
The full form of SONAR is "Sound Navigation and Ranging". It is a technique involving the use of sound propagation for navigation and can also be used to detect distant objects and interact with other objects. SONAR has a wide range of underwater applications such as underwater interaction and underwater route planning.
The first person to use the SONAR concept was Leonardo da Vinci, who placed a tube in the water in 1490 to hear the noise of other vessels.
Working Principle of SONAR
The sound wave is generated and transmitted by the transducer. The sensor detects the reflected sound waves from the object and records them, which are further analyzed to obtain the required information.
Types of SONAR
The two types of technology that fall under the name "SONAR" are
- Active SONAR
- Passive SONAR
Active sonar
- It involves emitting sound waves and waiting for the echo to return.
- It has a receiver and a transmitter.
- The transmitter creates high-frequency sound waves in a specified direction, and the receiver receives the reproduced high-frequency sound waves back from the target.
- Some animals use echolocation (active sonar) to locate predators and targets. Examples of whales, dolphins, etc.
Passive sonar
- It is involved in listening to the sound produced by underwater objects.
- It only has a receiver.
- Identifies noise coming from underwater objects. It detects sound coming from the receiver, but does not transmit sound.
- It is useful for underwater research missions.
Advantages
- SONAR is truly the best tool we have for detecting underwater objects. SONAR is useful for detecting water depth and for navigation.
- It is a precise method.