The high frequency ultrasonic cleaning machine has the advantages of good cleaning effect and simple operation. The sound you hear is a 20-20,000 hertz sound wave. The sound above 20,000 hertz is called an ultrasonic wave, and it travels along a sinusoidal curve, producing a lot of small bubbles. One reason is that the local tensile stress in the liquid forms negative pressure, which makes the dissolved gas supersaturate and escape from the liquid to form small bubbles Another reason is that a strong tensile stress“Tears” the liquid into a cavity, called cavitation.