Ultrasound is a sound wave that exceeds the auditory frequency of the human ear (20-20KHz). Since the transmission ability of sound in air is far weaker than that in liquid, liquid such as clean water should be used as a medium to clean objects through ultrasonic wave, so Ultrasonic cleaning are all equipped with water tanks for placing objects and filling water. The vibration of ultrasonic waves can cause cavitation in water, producing countless small bubbles that quickly rupture and generate instantaneous high pressure, causing ultrasonic vibration to cause dirt on the surface of the object to fall off
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