Question

what do you mean by sonar? how it is used for communication by humans and animals?

Answer 1

Have you ever wondered how sound can be used to detect distant objects? Let's start with some background information. You can think of sound as vibrations of molecules that propagate through a given medium. For example, humans and animals can hear a dog's bark because the bark produces disturbances in the air molecules around it that end up reaching the ears. Just as sound can travel through air, it can also propagate through water or other transmission media.

Sonar is a way of communicating, navigating, and detecting objects by using sound propagation. For the remainder of this lesson, we will focus on underwater sonar, which is used by submarines and some aquatic animals to perform the previously mentioned tasks.

Active and Passive Sonar

Sonar can be categorized as being 'active' or 'passive'. Active sonar involves the transmission and reception of sound waves. For example, when a submarine is used to map the topography of the ocean's floor, it sends out sound pulses, often referred to as pings, towards the bottom of the ocean within its vicinity. As these sound pulses travel downwards, they will encounter physical features such as hills, valleys, and rocks. The sound pulses are subsequently reflected back up towards the submarine, having been modified by the objects along their path. The reflected pulses are often called echos. Receivers on the submarine that detect these echos can then reconstruct the topography of the region from which the echos bounced off.

Answer 2

it's a device which is useful in detecting object under water by emitting sound waves.........

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