Question

What is ultrasound?give its applications as (a)medical

(b)industry

in what frequency range does ultrasound lie?

Answer 1

Ultra sounds means sound with frequency more than 20 Khz. This frequency is inaudible to human ears.
Industrial use:1) It is used for cleaning, mixing and speeding up chemical processes.
2) To detect objects
Medical use: It is used for imaging, sonographyy etc.

Range : It has frquency higher than 20 Khz. Ultrasound devices works from 20 Khz to gigahertz.