Kent,

Appropriate link, thank you.

John Keeley is a whole subject unto himself but is a continuation of this train of thought, following in the footsteps of Tesla.

"Sympathetic Vibration
Sympathetic Vibratory Physics

Keeley spent 50 years of his life learning about how sound could be used to propel material, and affect the physical properties of objects. He invented many curious contraptions to demonstrate and further investigate this peculiar brand of science.

He demonstrated to numerous people his basis for a prototype engine.
He demonstrated to the American Navy, a vibratory cannon.
In 1887 he discovered how to disintegrate quartz and other types of hard rock
In 1888 he demonstrated a " rock disintegrator " in the catskill mountains of New York state, to 12 wealthy financiers of American gold mining operations, so successfully, that it caused a minor panic on the San Fransisco stock market.

The rock disintegator demonstrations led to him being granted additional funding, but he insisted on studiously following his careful and steady progress on his own. This angered all his investors, that they threatened to withdraw his funding and put him in prison.
He refused to share any of his secrets until his work was complete, and this made matters worse for him. He eventually burned all his papers and destroyed his equipment, leaving him to live out his remaining years, poor and forgotten."

Look to the Hutchison Effect as well, imagination running!