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The Glottal Source Produces a Harmonic Series

Bridge node from oscillation to acoustics. A repeating non-sinusoidal puff train contains energy at the repetition rate and at whole-number multiples of it. This is what a filter later shapes, so it must exist before source-filter separation. It is also why fundamental frequency and formants are different kinds of object rather than two numbers of the same kind.

Questions this Concept answers

Why does the glottal source contain energy at many frequencies rather than at just one?

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PDF How Are Harmonics Produced at the Voice Source?

Titze asks where the harmonics in a voice actually come from, and separates the spectrum measured at the mouth - which already carries the vocal tract's filtering - from the spectrum of the flow at t…