Ultrasound: Definition And Application
Bats do not have the property of vision. Then how do they navigate and locate their prey? We have read that echolocation is the technique they use. But ever wondered, what echolocation is? How does it work? In this section, we shall learn in detail about echolocation and the principle of ultrasound on which it works. What is Ultrasound? Sound waves with frequencies higher than the upper audible limit of human hearing are called ultrasound. The limit varies from person to person but is approximately 20,000 Hertz. The physical properties of ultrasound are similar to the normal audible sound. This type of scientific concept is used in many different fields such as navigation, medicine, imaging, cleaning, mixing, communication, testing etc. Even in nature, bats and porpoises use this particular technique for the location of prey and obstacles. In the following section, we shall learn about its applications. Applications: Cleaning: In objects with parts that are difficult to reach, for exam...