Yeah there are two ways I know of to achieve atomization using ultrasonic transducers.
1. Blast water with ultrasonic waves such that the top of the waves break off into droplets. This is well studied in the literature, but you need a decent amount of power to make it work.
2. Metal mesh piezo atomization. This uses the planar vibrational modes of a piezo disc to rapidly shove liquid through tiny holes.
Shit so they're basically just mis-representing what they're doing in there? I know about these things because I was looking into people who were experimenting with trying to grow food with roots dangling in nutritious fog for a while
Aeroponics is exactly what got me interested in the technology as well. I haven’t actually looked at the link so no idea about what they are potentially misrepresenting, but I did find it quite difficult to find good info on the metal mesh atomizers.