>>15026800

Anon did some destructive vibration testing for military contractors.

Any time you see resonance, something out there is being excited by a certain frequency, and it's just a matter of time before it breaks.

If that "something" is well designed, it could resonate without damage for a very long time.

On the other hand…

>>15027773

If one has control of the vibration device, one can sweep up/down the frequency band and pick out the spots of resonance from accelerometers.

Unfortunately, we do not have control, and the vibrations occur at multiple frequencies, so we don't know which one is tickling our fancy.