How do ultrasonic waves kill microorganisms?
Ultrasonics won’t kill a virus. The non-life forms have a “purely chemical” structure, and are unaffected by the direct application of ultrasonics. (Again, the heat issue is set aside. Focus on the ultrasonics.) Mold spores cannot be deactivated by ultrasonics. There are a lot of drawbacks to using ultrasonics to “clean” and to “sterilize” areas. It isn’t all that good. But research is continuing. And Europe leads the league in the medical investigation of ultrasonics at last word.