The 20 kHz ultrasonic transducer is high-frequency and easy for assembling. It can be used in welding/cutting/sewing machine and it is easy matching with ultrasonic power supply.
The core of the ultrasonic transducer is the piezoelectric ceramic sheet. As is true in many other applications for piezo-electric materials, an assembly of multiple ceramic elements offers considerable performance and production advantages in ultrasonic transducer, relative to a single ceramic element.