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acoustics for the Greeks

Author: Ken Mills
Date: 2006-02-24 22:48

Dear People; How did the Greeks get the 12 different notes? That is the question (for us at any rate) and they created the language. And these intervals (notes) are universal, after all when you pluck a a guitar string it vibrates in halves, thirds, fourths, etc, and these harmonics can be slightly heard when one note is played. The frets on the guitar neck get a little closer and closer as you go down just like the series of quotients above. In math we call this the haramonic series. The Greeks blew on the trumpet (the valves did not get invented until 1812) and besides the octave one gets that fourth (or fifth). The interval of the fourth sounds the first two notes of Here Comes the Bride. One fourth on top of the last note played went 12 notes until you got back to where you started (with the octave adjustment of course). How does a trumpet or bugle overblow in fourths? So do squeeks on the clarinet. Oh by the way, the perfect fourth is not in a single note's harmonics while we get mostly the octave of course and the sharp four, etc. You Should Hear Me, Ken

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