What is Ultrasonic Cleaning and How Does It Work? Ultrasonic cleaner Ultrasonic Cleaning combines the science of engineering and chemistry to create an unsurpassed cleaning.Ultrasonic cleaner Ultrasonic power at high frequency - normally 30KHz(also 23KHz or 40KHz) is fed to piezo electric crystals.Ultrasonic cleaner the electrical power is converted to mechanical vibrations by these piezo electric transducers(PZT).