1.   Another use is to produce pictures of an unborn baby by reflecting ultrasonic waves off its body.

2.   Ultrasonic waves are at a higher pitch than the human ear can hear.

3.   Ford is looking at infrared technology, which sends out an ultrasonic wave.

4.   These screens detect the absorption of ultrasonic waves at the point of touch.

5.   The anti-burglary system transmits ultrasonic waves, not audible to human ear, to detect the movement of an object.

6.   The system tranmits ultrasonic waves, not audible to the human ear, to detect the movement of an object.

7.   The ultrasonic waves produce bubbles that batter dirt particles, which are then dissolved by a combination of activated oxygen and hypochlorous acid generated by electrolyzing the wash water.