Question

What is ultrasonic??

Din bhar nalle beithna bhi to kinna mehnat ka kam ha -,- ​

Answer 1

Explanation:

Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" sound in its physical properties, except that humans cannot hear it.

Answer 2

Answer:

$\red{ \boxed{\sf{Answer}}}$

Ultrasonics, vibrations of frequencies greater than the upper limit of the audible range for humans—that is, greater than about 20 kilohertz. The term sonic is applied to ultrasound waves of very high amplitudes.