destroy

"By the way, if someone were to get violently bored and decide to make
a CD that isolated the sounds of Glenn Gould's humming along to his
piano playing and just recorded that, I would buy it. The humming
ones, played on headphones, are some of my favorite parts." --
http://www.bookslut.com/blog/archives/2009_12.php#015521

"Everything in nature vibrates at a certain frequency. When an object
is vibrated at its natural resonance, it begins to undergo severe
shock, as it tries to shake itself apart. It would be ludicrous to
imagine that a tiny oscillator could by itself bring down a building,
if not for the principle of resonance. Like a child on a swing, only a
very small force is required to maintain a fairly large reciprocating
motion. A major vibration could be established in a house by
coinciding each stroke of the piston with the return of the individual
vibrations through the building to where the oscillator is. Every time
the piston hits, it magnifies the force a little more. At frequencies
of 1000Hz, the force build-up can be very appreciable! The frequency
of resonance is linked to the time it takes for the vibrations to
spread out through the building, reverberate, and the "echoes" to
return to the oscillator again. By finding the correct frequency, ANY
structure can be destroyed. In fact, the larger it is, the lower the
resonant frequency is, so the easier it is to destroy. Tesla once
joked that he could split the Earth with one of these devices, and
no-one ever knew if he was joking...................."
--http://www.angelfire.com/scifi/EclipseLab/Tesla/Oscillator.html