Labialization of Unstressed Vowels in Russian: Phonetic and Perceptual Evidence

  • Daniil KocharovEmail author
  • Vera Evdokimova
  • Karina Evgrafova
  • Mariia Morskovatykh
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11096)


The unrounded Russian vowel phonemes are occasionally pronounced as rounded in unstressed positions. This can be observed when one of the following vowels is rounded. The aim of current research is to define how strong this phonological process is and what factors trigger the process. The experimental results showed this tendency in speech of young adults. Vowel labialization occurs in about a third of non-immediately-pretonic and post-tonic syllables in connected speech. While the roundedness of vowels does not affect word intelligibility, it is clearly perceived when vowels are perceived in isolation or within a syllable. The tendency should be taken into account in developing probabilistic dictionaries for automatic speech recognition and G2P procedures.


Labialization Spectral features Perception Vowels Russian 



Supported by Russian Foundation for Basic Research, grant 18-012-00767.


  1. 1.
    Ahmed, S., Grosvald, M.: Long-distance vowel-to-vowel coarticulation in Arabic: influences of intervening consonant pharyngealization and length. Lang. Speech (2018)Google Scholar
  2. 2.
    Avanesov, R.I.: Russian Standard Pronunciation [Russkoe literaturnoe proiznoshenie]. Prosveschenije, Moscow (1950)Google Scholar
  3. 3.
    Bondarko, L.V.: Phonetics of Contemporary Russian [Fonetika sovremennogo ruskogo jazyka]. Saint-Petersburg State University, St. Petersburg, Russia (1998)Google Scholar
  4. 4.
    Chiu, F., Fromont, L., Lee, A., Xu, Y.: Long-distance anticipatory vowel-to-vowel assimilatory effects in French and Japanese. In: Proceedings of the 18th International Congress of Phonetic Scences (ICPhS 2015), pp. 210–214 (2015)Google Scholar
  5. 5.
    Crosswhite, K.: Vowel Reduction in Optimality Theory. Ph.D. thesis, UCLA (1999)Google Scholar
  6. 6.
    Evdokimova, V.V.: The use of vocal tract model for constructing the vocal structure of the vowels. In: Proceedings of International Conference on Speech and Computer 2006, pp. 210–214 (2006)Google Scholar
  7. 7.
    Fant, G.: Acoustic Theory of Speech Production. Mouton De Gruyter (1970)Google Scholar
  8. 8.
    Fant, G.: The voice source in connected speech. Speech Commun. 22(2–3), 125–139 (1997)CrossRefGoogle Scholar
  9. 9.
    Fant, G., Liljencrants, J., Lin, Q.: A four-parameter model of glottal flow. STL-QPSR 26(4), 001–013 (1985)Google Scholar
  10. 10.
    Grosvald, M.: Interspeaker variation in the extent and perception of long-distance vowel-to-vowel coarticulation. J. Phon. 37, 173–188 (2009)CrossRefGoogle Scholar
  11. 11.
    Kalenchuk, M.L., Kasatkin, L.L., Kasatkina, R.F.: The Large Orthoepic Dictionary of Russian [Bolshoj orfograficheskij slovar russkogo yazyka]. AST-Press, Moscow (2012)Google Scholar
  12. 12.
    Löfqvist, A., Manderson, B.: Long-time average spectrum of speech and voice analysis. Folia Phoniatr. 39, 221–229 (1987)CrossRefGoogle Scholar
  13. 13.
    Matusevich, M.I.: Contemporary Russian. Phonetics [Sovremennyj russkij jazyk. Fonetika]. Prosveschenije, Moscow (1976)Google Scholar
  14. 14.
    Öhman, S.E.: Coarticulation in VCV utterances: spectrographic measurements. J. Acoust. Soc. Am. 39(1), 151–168 (1965)CrossRefGoogle Scholar
  15. 15.
    Recasens, D.: An acoustic analysis of V-to-C and V-to-V coarticulatory effects in Catalan and Spanish VCV sequences. J. Phon. 15, 299–312 (1987)Google Scholar
  16. 16.
    Tarnóczy, T., Fant, G.: Some remarks on the average speech spectrum. STL-QPSR 5(4), 013–014 (1964)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  • Daniil Kocharov
    • 1
    Email author
  • Vera Evdokimova
    • 1
  • Karina Evgrafova
    • 1
  • Mariia Morskovatykh
    • 1
  1. 1.Saint Petersburg State UniversitySt. PetersburgRussia

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