What is ultrasonic?
Ultrasonic is sound generated beyond human audible level. In real life, high pitch sound is created by high frequency, and alternatively, the low and base tone is created by low frequency. Frequencies above 16 kHz in general are being considered as ultrasonic. Typical ultrasonic frequencies used for cleaning purpose are from 20 kHz to 80 kHz.
What is “cavitation”?
A.”Cavitation” is the rapid formation and collapse of millions of tiny bubbles (or cavities) in a liquid. Cavitation is produced by the alternating high and low-pressure waves generated by high frequency (ultrasonic) sound. During the low-pressure phase, these bubbles grow from microscopic size until, during the high-pressure phase, they are compressed and implode.