1. Ultrasonic waves are used in echocardiography It is used to construct the image of the heart(it)
2. Ultrasonic waves are used in the detection of cracks in metal blocks.
3. Ultrasonic waves are used to kill bacteria in liquid.
4. Ultrasonic waves for determining the depth of the sea.
5. Ultrasonic waves is also used to see what is happening to the components inside a nuclear reactor.