Question

1. what is ultrasound?​

Answer 1

Sound or other vibrations having an ultrasonic frequency, particularly as used in medical imaging.

HOPE IT WILL HELP YOU

Answer 2

short answer

sounds with a frequency above the normal audible range (i.e.,more than 20000 Hz ) are known as ultrasound

OR

long answer

Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" (audible) sound in its physical properties, except that humans cannot hear it. ... Ultrasonic devices are used to detect objects and measure distances.

❤MissAstonish❤