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Demo of a vowel synthesis algorithm
developed by

Ingo Hertrich at the University of Tuebingen

Working principle:

Formants are generated as sinusoids that are amplitude- and phase-modulated by the fundamental frequency. (Abstract)


Fromant transition and vowel of the syllable
Fromant transition and vowel of the syllable
Stop consonant-diphthong-sequence

The algorithm works in an additive way. Here is an example of the various fundamental frequency and formant components of the stop consonant-vowel syllable


Fundamental frequency component


first formant


second formant


third formant


fourth formant


fifth formant



For a more detailed description see: J. Acoust. Soc. Am. 106 (1999), 2988-2990

Anybody who is interested in using this program may contact:

Ingo Hertrich, PhD
Department of Neurology
University of Tuebingen
Hoppe-Seyler-Str. 3
72076 Tuebingen, Germany

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