The principle of ultrasonic cleaning is to use the physical effect of cavitation, radiation pressure, sound flow and so on when the ultrasonic wave propagates in the cleaning fluid, which has mechanical peeling effect on the dirt on the cleaning parts, at the same time, it can promote the chemical reaction between the cleaning solution and the dirt, and achieve the goal of cleaning the object. The frequency of the ultrasonic cleaning machine can be chosen 21-100khz, usually 28KHZ/40khz, according to the size and purpose of the cleaning material. As the frequency of the Ultrasonic transducer increases, horn-type and column-type oscillators can be used. In the miniaturization aspect, also has uses the circular plate oscillator the radial vibration and the bending vibration. Ultrasonic cleaning has been widely used in various industries such as industry, agriculture, household equipment, electronics, automobile, rubber, printing, aircraft, food, hospital and medical research.

The Ultrasonic transducer are widely used and can be divided into industrial, agricultural, transport, medical and military sectors according to the industries in which they are applied, and by the functions they perform, it can be divided into ultrasonic processing, ultrasonic cleaning, ultrasonic detection, detection, monitoring, remote sensing, remote control, etc. , can be divided into power ultrasound, detection ultrasound, ultrasound imaging.