Extraction of the vocal tract area function by external stimulus

Authors

  • Hocine Teffahi Univ. Sci./Technol. Houari B., Lab. Commun. Parlee/Traitement Sign., Fac. d'Electron. et d'Info., BP 32, El alia, Alger, Algeria
  • Bernard Guerin Inst. de Communication Parlée, INPGrenoble, 46 Avenue Félix Viallet, 38000, Grenoble, France
  • Amar Djeradi Univ. Sci./Technol. Houari B., Lab. Commun. Parlee/Traitement Sign., Fac. d'Electron. et d'Info., BP 32, El alia, Alger, Algeria

Keywords:

Acoustic noise, Acoustic waves, Frequencies, Knowledge acquisition, Signal processing, Transfer functions, Cross-correlation, Noise excitation, Tones, Vocal tract

Abstract

Knowledge of vocal tract area function is important for the understanding of phenomena occurring during speech production. We present here a new measurement method based on external excitation of the vocal tract with a known pseudo-random sequence, where the area function is obtained by a linear prediction analysis applied at the cross-correlation between the sequence and the signal measured at the lips. The advantages of this method over methods based on sweep-tones or white noise excitation are (1) a much shorter measurement time (about 100 ms), and (2) the possibility of speech sound production during the measurement. This method has been checked against classical methods through systematic comparisons on a small corpus of vowels. Moreover, it has been verified that simultaneous speech sound production does not perturb significantly the measurements. This method should thus be a very helpful tool for the investigation of the acoustic properties of the vocal-tract in various cases such as vowels.

Additional Files

Published

2004-12-01

How to Cite

1.
Teffahi H, Guerin B, Djeradi A. Extraction of the vocal tract area function by external stimulus. Canadian Acoustics [Internet]. 2004 Dec. 1 [cited 2025 Feb. 21];32(4):15-2. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1701

Issue

Vol. 32 No. 4 (2004)

Section

Technical Articles

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