Ultrasound.

What is ultra sound?

An ultrasonic wave is a sound wave above 20000hz. They have many different uses such as...

• Ultrasonic scanners... these are used to produce images of organs in the body. The probe that they put on your body produces a pulse of an unltrasonic wave it then detects the wave when it returns. The wave reflects off different boundaries, such as a baby's heart.

These scans…