Question

Short notes about applications od ultra sound

Answer 1

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.

The concept of ultrasound is used in many different fields such as navigation, medicine, imaging, cleaning, mixing, communication, testing etc. Even in the nature, bats and porpoises use ultrasound for the location of prey and obstacles. In the following section, we shall learn about the applications of ultrasound.

Answer 2

ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is no different from 'normal' (audible) sound in its physical properties, except in that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz (20,000 hertz) in healthy, young adults. Ultrasound devices operate with frequencies from 20 kHz up to several gigahertz.

Ultrasound is used in many different fields. Ultrasonic devices are used to detect objects and measure distances. Ultrasound imaging or sonography is often used in medicine. In the nondestructive testing of products and structures, ultrasound is used to detect invisible flaws. Industrially, ultrasound is used for cleaning, mixing, and to accelerate chemical processes. Animals such as bats and porpoises use ultrasound for locating prey and obstacles