Musical Instrument Blog #1

The glass harmonica is played by wetting one's fingertips, then pressing them onto the edges of the bowls as they rotate.
Differently sized bowls produce different notes.
The bowls are nested within each other, so the entire rack of bowls is cone-shaped.
It makes me think about how sounds that we don't generally think of as "music," like the rubbing of a wet fingertip across a glass surface, can be used to create music.
Since the bowls are nested within each other, the waves must only radiate out.  Otherwise, a portion of the sound would be lost.

Music by Mozart, performed on a glass harmonica by French artist Thomas Bloch:  http://www.youtube.com/watch?v=_XPfoFZYso8

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