Global Resource Corp (fka GBRC)

[RickyCox101]

The key word is "resonant frequency" and that is the frequency equaling the specific frequency of the effective material.

Hawk put it to me like this. He was called in by Scientific Atlanta to investigate why a center pivot irrigation system collapse to the ground in several farm fields. He found that the sprinkler devices used on the center pivot systems as supplied by one particular sprinkler head manufacturer set up a resonating frequency equal to the resonant frequency of the structure and the magnitude of that resonant frequency broke the bad welds of the system.

However, it was not a molecular change of the metals that the resonant frequency caused it was the weakest link that couldn't hold up to the vibration.