So
this experiment is the
Chladni plate experiment.
I
used a tone generator, a wave driver (speaker) and a
metal plate attached to the speaker.
First add sand to the plate then begin playing a tone.
Certain frequencies vibrate the metal plate in such a
way that it creates areas where there is no vibration.
The
sand "falls" into those areas, creating beautiful
geometric patterns.
As
the frequency increases in pitch the patterns become
more complex.