All walks of life can use ultrasound, generally divided into detection of ultrasound and power ultrasound, detection of ultrasound in ultrasound as a signal, such as ultrasound, radar, hydroacoustic applications. Power ultrasound is a high-power ultrasound, the use of acoustic energy, mechanical effects, thermal effects, cavitation, biomedical effects (crushing, emulsification, etc.), chemical effects. It can be applied to ultrasonic welding, ultrasonic chemistry, ultrasonic cleaning, ultrasonic processing (punching, engraving, polishing, etc.), ultrasonic therapy, ultrasonic surgery, ultrasonic cosmetic, ultrasonic motors and ultrasonic levitation.