Ultrasonic waves are those sound waves that are inaudible to our ears because they have a very high frequency. These energy-rich waves are used in many ways such as cleaning dental braces or spectacle glasses. Ultrasonic waves excite the liquid to vibrate so fast that it removes the dirt. Ultrasonic waves are also reflected from the inner organs of our body; thus, an echo is produced. This echo can be recorded and displayed by medical devices. In this way, doctors can safely monitor the development of a foetus inside the mother’s womb.
