The superiority of ultrasonic extraction of traditional Chinese medicine is based on the special physical properties of ultrasound. Mainly through the rapid mechanical vibration waves generated by piezoelectric transducers, the force between the target extract and the sample matrix is reduced to achieve solid-liquid extraction separation.

(1) Accelerate the motion of particles in the medium. When the ultrasonic wave with an acoustic frequency higher than 20 KHz travels in a continuous medium (such as water), according to the Huygens wave principle, the wavefront will cause the movement of the medium particles (including the particles of the important effective ingredients of the medicinal materials), so that the movement of the medium particles can obtain huge acceleration and kinetic energy. The acceleration of a particle can generally reach over 2000 times the acceleration of gravity through calculation. Due to the action of ultrasonic energy on the active ingredients of medicinal herbs by the medium particles, tremendous acceleration and kinetic energy are obtained, which quickly escape from the medicinal substrate and become free in water.

(2) Cavitation effect. Ultrasonic waves propagate in liquid media and generate a special "cavitation effect". The "cavitation effect" continuously generates countless micro air pockets with internal pressure reaching thousands of atmospheres and continuously "explodes" to generate powerful shock waves at the micro level on traditional Chinese medicine, causing the components and substances of the medicine to be "bombarded" and escape, and causing the medicine matrix to be continuously eroded. The medicinal components that do not belong to the plant structure are constantly separated. Accelerate the extraction of effective ingredients from plants.

(3) The vibration homogenization of ultrasound ensures that all points in the sample medium are subjected to consistent effects, resulting in a more uniform extraction of the entire sample.

In summary, the medicinal substances in traditional Chinese medicine not only obtain enormous acceleration and kinetic energy as medium particles under the action of ultrasonic field, but also obtain strong external force impact through "cavitation effect", so they can be efficiently and fully separated.