Question

What is ultrasound?
&how is it help for kidney stone?

Answer 1

ultrasound are sound waves which have frequency of above20000

Answer 2

Here is Your Answer -

Sound or other vabirations having an ultrasonic frequency is known as Ultrasound.

kidney stone can not pass through the Urine.

That's why we use ultrasound because Ultrasound shock waves are then sent to the stone from a machine to break it into smaller pieces.