Discriminatory Capacity of the Most Representative Phonemes in Spanish: An Evaluation for Forensic Voice Comparison

  • Fernanda López-EscobedoEmail author
  • Luis Alberto Pineda Cortés
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10061)


In this paper, a study of the discriminatory capacity of the most representative segments for forensic speaker comparison in Mexican Spanish is presented. The study is based on two corpora in order to assess the discriminatory capacity of the fundamental frequency and the three first vocalic formants acoustic parameters for reading and semi-spontaneous speech. We found that the context /sa/ has 73% of discriminatory capacity to classify speakers using the three first formants of the vowel /a/ with a dynamic analysis. We used several statistical techniques and found that the best methodology for the recognition of patterns consists of using linear regression with a quadratic fitting to reduce the number of predictors to a manageable level and apply discriminant analysis on the reduced set. This result is consistent with previous research data despite the methodology for Mexican Spanish had never been used.


Pattern recognition Forensic speech recognition Linear Discriminant Analysis Principal Component Analysis Linear Regression 



Authors want to thank Mrs. Josefina Bolado, Head of the Scientific Paper Translation Department, from División de Investigación at Facultad de Medicina, UNAM, for editing the English-language version of this manuscript.


  1. 1.
    Zipf, G.K., Rogers, F.M.: Phonemes and Variphones in four present-day Romance Languages and Classical Latin from the viewpoint of dynamic Philology. Archives Néerlandaises de Phonétique Experimentale 15, 111–147 (1939)Google Scholar
  2. 2.
    Navarro, T.: Estudios de Fonología Española. Syracuse University Press, New York (1946)Google Scholar
  3. 3.
    Alarcos, T.: Estudios de Fonología Española. Gredos, Madrid (1991)Google Scholar
  4. 4.
    Guirao, M., García, J.: Estudio Estadístico del Español. Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires (1993)Google Scholar
  5. 5.
    Pérez, E.: Frecuencia de fonemas. E-rthabla, Revista de Tecnologías del habla 1, 1–7 (2003).
  6. 6.
    Cuétara, J.: Fonética y fonología del habla espontánea de la ciudad de México. Su aplicación en las tecnologías del habla [disertation]. Universidad Nacional Autónoma de México, México (2004)Google Scholar
  7. 7.
    Pineda, L., Castellanos, H., Cuétara, J., Galescu, L., Juárez, J., Llisterri, J., Pérez, P., Villaseñor, L.: The Corpus DIMEx100: transcription and evaluation. Lang. Resourc. Eval. 44, 347–370 (2010)CrossRefGoogle Scholar
  8. 8.
    Guerra, R.: Estudio estadístico de la sílaba en español. In: Esgueva, M., Cantanero, M. (eds.) Estudios de Fonética, vol. I, pp. 9–112. Consejo Superior de Investigaciones Científicas, Madrid (1983)Google Scholar
  9. 9.
    McDougall, K.: Speaker-specific formant dynamics: an experiment on Australian English /aI/. Int. J. Speech Lang. Law 11(1), 103–130 (2004)CrossRefGoogle Scholar
  10. 10.
    McDougall, K.: Dynamic features of speech and the characterization of speakers: toward a new approach using formant frequencies. Int. J. Speech Lang. Law 13(1), 89–126 (2006)CrossRefGoogle Scholar
  11. 11.
    Eriksson, E., Sullivan, K.: An investigation of the effectiveness of a Swedish glide+vowel segment for speaker discrimination. Forensic Linguist. 5(1), 51–66 (2008)Google Scholar
  12. 12.
    Pardo, A., Ruiz, M.A.: SPSS 11. Guía Para el Análisis de Datos. McGraw-Hill, Madrid (2002)Google Scholar
  13. 13.
    Rencher, A.: Methods of Multivariate Analysis. John Wiley & Sons Inc., Publication, USA (2002)CrossRefzbMATHGoogle Scholar
  14. 14.
    Labov, W.: Field methods used by the project on linguistic change and variation. In: Baugh, J., Sherzer, J. (eds.) Language in use: Readings in Sociolinguistics. Prentice Hall, New Jersey (1984)Google Scholar
  15. 15.
    Turell, M.: La base teórica y metodológica de la variación lingüística. In: Turell, M. (ed.) La Sociolingüística de la Variación. Promociones y Publicaciones Universitarias, Barcelona (1995)Google Scholar
  16. 16.
    Greisbach, R., Esser, O., Weinstock, C.: Speaker identification by formant contours. In: Braun, A., Köster, J. (eds.) Studies in Forensic Phonetics, pp. 49–55. Wissenschaftlicher Verlag, Trier (1995)Google Scholar
  17. 17.
    Rose, P.: Long- and short-term within-speaker differences in the formants of Australian hello. In: Braun, A., Köster, J. (eds.) Studies in Forensic Phonetics, pp. 49–55. Wissenschaftlicher Verlag, Trier (1995)Google Scholar
  18. 18.
    McDougall, K.: Nolan, F: Discrimination of speakers using the formant dynamics of /u:/ in british English. In: Trouvain, J., Barry, W.J. (eds.) Proceeding of the 16th International Congress on Phonetic Sciences, pp. 1825–1828. Universität des Saarlandes, Saarbrücken (2007)Google Scholar
  19. 19.
    Kinoshita, Y., Ishihara, S., Rose, P.: Exploring the discriminatory potential of F0 distribution parameters in traditional forensic speaker recognition. Int. J. Speech Lang. Law 16(1), 91–111 (2009)CrossRefGoogle Scholar
  20. 20.
    Nolan, F.: The Phonetic Bases of Speech Recognition. Cambridge University Press, Cambridge (1983)Google Scholar
  21. 21.
    Hollien, H.: The Acoustics of Crime. The New Science of Forensic Phonetics. Plenum Press, New York (1990)Google Scholar
  22. 22.
    Jiang, M.: Fundamental frequency vector for a speaker identification system. Forensic Linguist. 3(1), 95–106 (1996)Google Scholar
  23. 23.
    Jessen, M.: Speaker-specific information in voice quality parameters. Forensic Linguist. 4(1), 84–103 (1997)Google Scholar
  24. 24.
    Foulkes, P., Barron, A.: Telephone speaker recognition amongst members of a close social network. Forensic Linguist. 7(2), 180–198 (2000)Google Scholar
  25. 25.
    Freund, R., Wilson, W., Sa, P.: Regression Analysis. Statistical Modeling of a Response Variable. Elsevier, Amsterdam (2006)Google Scholar
  26. 26.
    Boersma, P., Weenink, D.: Praat: doing phonetics by computer [Computer program]. 5.1.25 Version. University of Amsterdam (2010)Google Scholar

Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Fernanda López-Escobedo
    • 1
    Email author
  • Luis Alberto Pineda Cortés
    • 2
  1. 1.Licenciatura en Ciencia Forense, Facultad de MedicinaUNAM, Circuito de la Investigación Científica SN, CUCiudad de MexicoMexico
  2. 2.Departamento de Ciencias de la Computación, IIMASUNAM, Circuito Escolar SN, CUCiudad de MexicoMexico

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