Just following up on someone else's idea to vibrate plates. What if we
add piezo particles to our chemicals or between plates? Seems the
bass frequencies that tend to rattle windows, could work well.
When a piezo crystal expands at their resonant f, do they give back the
energy put in, when they return to their original dimensions (or otherwise?)
H2 capacitors? Plates could be really thin like foil, quartz sand as the
piezo/dielectric. Very cheap. I did this once using 60hz in a plastic
parts tray, full of wet sand, a plate on each end. It made mist, got hot
from the current flow (like a semiconductor); curious what HV spikes at variable f's might do.
More on piezos:
http://www.physikinstrumente.com/tutorial/4_15.html