Here's Jaime Vendera (measured at 120 db) doing it:
Apparently unless you're at the resonant frequency you need over 163 db to shatter glass:
Apparently unless you're at the resonant frequency you need over 163 db to shatter glass:
> "Even if you could excite the cup, that doesn't guarantee it would break. Fracture depends on the size of the initial defects."
I have to wonder if Jaime tapping the glass with a spoon in that video not only reveals the frequency he needs, but more crucially introduces tiny fractures.