A simulation study on the effect of glottal boundary conditions on vocal tract formants

Yasufumi Uezu, Tokihiko Kaburagi

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

In the source-filter theory, the complete closure of the glottis is assumed as a glottal boundary condition. However, such assumption of glottal closure in the source-filter theory is not strictly satisfied in actual utterance. Therefore, it is considered that acoustic features of the glottis and the subglottal region may affect vocal tract formants. In this study, we investigated how differences in the glottal boundary conditions affect vocal tract formants by speech synthesis simulation using speech pro-duction model. We synthesized five Japanese vowels using the speech production model in consideration of the source-filter interaction. This model consisted of the glottal area polyno-mial model and the acoustic tube model in the concatenation of the vocal tract, glottis, and the subglottis. From the results, it was found that the first formant frequency was affected more strongly by the boundary conditions, and also found that the open quotient may give the formant stronger effect than the maximum glottal width. In addition, formant frequencies were also affected more strongly by subglottal impedance when the maximum glottal area was wider.

Original languageEnglish
Pages (from-to)2292-2296
Number of pages5
JournalProceedings of the Annual Conference of the International Speech Communication Association, INTERSPEECH
Volume2017-August
DOIs
Publication statusPublished - Jan 1 2017
Event18th Annual Conference of the International Speech Communication Association, INTERSPEECH 2017 - Stockholm, Sweden
Duration: Aug 20 2017Aug 24 2017

All Science Journal Classification (ASJC) codes

  • Language and Linguistics
  • Human-Computer Interaction
  • Signal Processing
  • Software
  • Modelling and Simulation

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