Kejiemeng ultrasonic cleaner manufacturing experts point out that high-power and high-intensity ultrasonic waves continuously acting on human tissues are harmful. Low-power ultrasound is highly beneficial when acting intermittently on human tissues. Ultrasonic waves are a type of vibrating mechanical wave. Let me give you a simple example. When someone gives you a gentle back rub, you feel comfortable, but when they hit you hard, you feel pain or even hurt.