The energy transferred by ultrasound in the process of cleaning a watch serves two main purposes. Firstly, the high-frequency sound waves create tiny bubbles called cavitation bubbles in the cleaning solution. These bubbles implode near the surface of the watch, creating intense local energy and shock waves that dislodge dirt, debris, and contaminants. Secondly, the energy helps to agitate the cleaning solution, enhancing its ability to reach and remove particles from hard-to-reach areas of the watch. Overall, the energy from ultrasound promotes efficient and thorough cleaning of the watch by dislodging dirt and enhancing the cleaning solution's action.