Making conversational vowels more clear

Seyed Hamidreza Mohammadi, Alexander Kain, Jan Van Santen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Previously, it has been shown that using clear speech short-term spectra improves the intelligibility of conversational speech. In this paper, a speech transformation method is used to map the spectral features of conversational speech to resemble clear speech. A joint-density Gaussian mixture model is used as the mapping function. The transformation is studied in both the formant frequency and the line spectral frequency domains. Listening test results show that in noisier environments, the transformed speech signal improves vowel intelligibility significantly compared to the original conversational speech. There is also an increase in vowel intelligibility in less noisy environments, but the increase is not statistically significant. The significance tests are performed by Tukey comparison and planned one-tail t-test methods.

Original languageEnglish (US)
Title of host publication13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012
Pages642-645
Number of pages4
StatePublished - Dec 1 2012
Event13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012 - Portland, OR, United States
Duration: Sep 9 2012Sep 13 2012

Publication series

Name13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012
Volume1

Other

Other13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012
CountryUnited States
CityPortland, OR
Period9/9/129/13/12

Keywords

  • Clear speech
  • Conversational speech
  • Intelligibility
  • Speech transformation

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Communication

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  • Cite this

    Mohammadi, S. H., Kain, A., & Van Santen, J. (2012). Making conversational vowels more clear. In 13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012 (pp. 642-645). (13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012; Vol. 1).