The foaming cleaning activity sounds like what occurs with ultrasonic cleaning, where ultrasound (higher recurrence sound than people can hear) is utilized to create weight waves and imploding bubbles (actually called cavitation) that impact earth off things like mechanical machine parts that can be difficult to clean some other way. In any case, the extent that I can see, the similarity between ultrasonic cleaning and what occurs with a sonic toothbrush is absolutely shallow. Surely, a 2004 study of five diverse sonic toothbrushes by British dental scientists reasoned that "cavitational action does not happen around controlled toothbrushes. Working the toothbrushes for periods up to 20 min brought about no cavitational action being distinguished." That's not really amazing. Ultrasonic cleaning normally utilizes a lot higher recurrence (20,000– 40,000Hz) where the cavitation impact is significantly more articulated. As such, "sonic" is very deceptive—and minimal superior to anything a promoting term. Standard (turning head) oscillating brushes could likewise be portrayed as "sonic" in light of the fact that they make a clamor when they're vibrating. In the two cases, it's really the vibrating activity of the brush that is doing the cleaning.