It is the sound which person can't here Ultrasound uitlizes frequencies from and above18KHz (18,000cycles for each stable). High recurrence electrical vitality is changed over into ultrasound waves by methods for ultrasonic transducers, which are fortified on the base of S.S. cleaning tank. These high frerquency sound waves make in the fluid incalculable minuscule vacuum bubbles which quickly extend and crumple.