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Voiceless Consonants and Locus Equations: A Comparison with Electropalatographic Data on Coarticulation

  • Marija Tabain
From the journal Phonetica

Abstract

The appropriateness of using locus equations in a study of voiceless consonants is examined. The consonants investigated are the stops /t k/ and the fricatives /Θ s ∫/. The slope value of the locus equation, indicating degree of coarticulation in the CV syllable, is compared with electropalatographic (EPG) data on coarticulation. It is shown that, overall, there is a very poor correlation between locus equation and EPG data as regards coarticulation. It is also shown that more accurate locus equation results – in terms of their correlation with EPG data – are obtained for stop consonants when F<sub>2</sub> onset is sampled at stop release, rather than at the onset of voicing for the vowel. Finally, results for the voiceless consonants are compared with results for their homorganic voiced counterparts. Whilst there is no significant difference between voiced and voiceless consonants in the EPG data, there is a significant difference between voiced and voiceless consonants in the locus equation data. These results suggest that locus equations cannot provide invariant cues for stop and fricative place of articulation across the voiced-voiceless distinction.


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References

1 Brancazio, L.; Fowler, C.A.: On the relevance of locus equations for the perception and production of stop consonants. Perception Psychophysics 60: 24&ndash;50 (1998).10.3758/BF03211916Search in Google Scholar

2 Cassidy, S.; Harrington, J.M.: EMU: an enhanced hierarchical speech data management system; in McCormack, Russell, Proc. 6th Aust. Int. Conf. on Speech Sci. Technol., pp. 361&ndash;366 (Australian Speech Science and Technology Association, Canberra 1996).Search in Google Scholar

3 Chennoukh, S.; Carre, R.; Lindblom, B.: Locus equations in the light of articulatory modeling. J. acoust. Soc. Am. 102: 2380&ndash;2389 (1997).10.1121/1.419622Search in Google Scholar

4 Chiba, T.; Kajiyama, M.: The vowel: its nature and structure (Tokyo Publishing Company, Tokyo 1941).Search in Google Scholar

5 Cox, F.: An acoustic study of vowel variation in Australian English; PhD thesis Macquarie University (1997).Search in Google Scholar

6 Ericsdotter, C.; Lindblom, B.; Stark, J.: Articulatory co-ordination in coronal stops: implications for theories of coarticulation. Proc. 14th Int. Congr. Phonet. Sci., San Francisco 1999.Search in Google Scholar

7 Fant, G.: Acoustic theory of speech production (Mouton, The Hague 1960).Search in Google Scholar

8 Farnetani, E.: V-C-V lingual coarticulation and its spatiotemporal domain; in Hardcastle, Marchal, Speech production and speech modelling, pp. 93&ndash;130 (Blackwell, Oxford 1990).10.1007/978-94-009-2037-8_5Search in Google Scholar

9 Fowler, C.A.: Invariants, specifiers, cues: an investigation of locus equations as information for place of articulation. Perception Psychophysics 55: 597&ndash;610 (1994).Search in Google Scholar

10 Fruchter, D.; Sussman, H.M.: The perceptual relevance of locus equations. J. acoust. Soc. Am. 102: 2997&ndash;3008 (1997).10.1121/1.421012Search in Google Scholar

11 Hardcastle, W.J.: The use of electropalatography in phonetic research. Phonetica 25: 197&ndash;215 (1972).10.1159/000259382Search in Google Scholar

12 Harrington, J.; Cassidy, S.; Fletcher, J.; McVeigh, A.: The mu&plus; system for corpus based speech research. Computer Speech Lang. 7: 305&ndash;331 (1993).10.1006/csla.1993.1017Search in Google Scholar

13 Harris, K.S.: Cues for the discrimination of American English fricatives in spoken syllables. Lang. Speech 1: 1&ndash;7 (1958).10.1177/002383095800100101Search in Google Scholar

14 Krull, D.: Second formant locus patterns as a measure of consonant-vowel coarticulation. Phonet. exp. Res. Inst. Ling. Univ. Stockh. (PERILUS) 5: 43&ndash;61 (1987).Search in Google Scholar

15 Krull, D.: Second formant locus patterns and consonant-vowel coarticulation in spontaneous speech. Phonet. exp. Res. Inst. Ling. Univ. Stockh. (PERILUS) 10: 87&ndash;108 (1989).Search in Google Scholar

16 Lindblom, B.: On vowel reduction. Rep. 29 (Royal Institute of Technology, Stockholm 1963).Search in Google Scholar

17 Lofqvist, A.: Interarticulator phasing, locus equations and degree of coarticulation. J. acoust. Soc. Am. 106: 2022&ndash;2030 (1999).10.1121/1.427948Search in Google Scholar

18 Mann, V.A.; Repp, B.H.: Influence of vocalic context on perception of the [E]-[s] distinction. Perception Psychophysics 28: 213&ndash;228 (1980).10.3758/BF03204377Search in Google Scholar

19 Pedhazur, E.: Multiple regression in behavioral research (Holt, Rinehart &amp; Winston, New York 1973).Search in Google Scholar

20 Perkell, J.: On the nature of distinctive features: implications of a preliminary vowel production study; in Lindblom, Ohman, Frontiers of speech communication research, pp. 365&ndash;380 (Academic Press, New York 1979).Search in Google Scholar

21 Recasens, D.: Coarticulatory patterns and degrees of coarticulatory resistance in Catalan CV sequences. Lang. Speech 28: 97&ndash;114 (1985).10.1177/002383098502800201Search in Google Scholar

22 Shadle, C.H.: The acoustics of fricative consonants; PhD thesis MIT (1985).Search in Google Scholar

23 Smits, R.; Bosch, L. ten; Collier, R.: Evaluation of various sets of acoustic cues for the perception of prevocalic stop consonants. I. Perception experiment. J. acoust. Soc. Am. 100: 3852&ndash;3864 (1996).10.1121/1.417241Search in Google Scholar

24 Stone, M.; Lundberg, A.: Three dimensional tongue-surface shapes of English consonants and vowels. J. acoust. Soc. Am. 99: 3728&ndash;3737 (1996).10.1121/1.414969Search in Google Scholar

25 Sussman, H.M.; Bessell, N.; Dalston, E.; Majors, T.: An investigation of stop place of articulation as a function of syllable position: a locus equation perspective. J. acoust. Soc. Am. 101: 2826&ndash;2838 (1997).10.1121/1.418567Search in Google Scholar

26 Sussman, H.M.; Fruchter, D.; Cable, A.: Locus equations derived from compensatory articulation. J. acoust. Soc. Am. 97: 3112&ndash;3124 (1995).10.1121/1.411873Search in Google Scholar

27 Sussman, H.M.; Hoemeke, K.A.; Ahmed, F.S.: A cross-linguistic investigation of locus equations as a phonetic descriptor for place of articulation. J. acoust. Soc. Am. 94:1256&ndash;1268 (1993).10.1121/1.408178Search in Google Scholar

28 Sussman, H.M.; Hoemeke, K.A.; McCaffrey, H.A.: Locus equations as an index of coarticulation for place of articulation distinctions in children. J. Speech Hear. Res. 35: 769&ndash;781 (1992).10.1044/jshr.3504.769Search in Google Scholar

29 Sussman, H.M.; McCaffrey, H.A.; Matthews, S.A.: An investigation of locus equations as a source of relational invariance for stop place categorization. J. acoust. Soc. Am. 90:1309&ndash;1325 (1991).10.1121/1.401923Search in Google Scholar

30 Sussman, H.M.; Shore, J.: Locus equations as phonetic descriptors of consonantal place of articulation. Perception Psychophysics 58: 936&ndash;946 (1996).10.3758/BF03205495Search in Google Scholar

31 Tabain, M.: Coarticulation in CV syllables: a comparison of locus equation and EPG data. J. Phonet. 28: 137&ndash;159 (2000).10.1006/jpho.2000.0110Search in Google Scholar

32 Tabain, M.: Variability in fricative production and spectra according to vowel context. Lang. Speech 44: 58&ndash;93 (2001).10.1177/00238309010440010301Search in Google Scholar

33 Tabain, M.; Butcher, A.: Stop consonants in Yanyuwa and Yindjibarndi: a locus equation perspective. J. Phonet. 27: 333&ndash;357 (1999).10.1006/jpho.1999.0099Search in Google Scholar

Published Online: 2002-03-28
Published in Print: 2002-03-01

© 2001 S. Karger AG, Basel

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