ESSV Konferenz Elektronische Sprachsignalverarbeitung

Title: Influence of the vocal tract morphology on the F1-F2 acoustic plane

Authors: Antoine Serrurier, Pierre Badin, Christiane Neuschaefer-Rube

Abstract:

In order to be understood, speakers must produce sounds that are recognised by listeners. Large inter-speaker morphology variability is however reported in the literature. This study explores the influence of seven morphological features on the F1-F2 formants: four related to global variations of the vocal tract and three to the palate shape. For this purpose, the contours of vocal tract articulators were manually segmented from midsagittal MRI images available for 11 French speakers sus-taining 62 articulations. The morphology features were measured for each speaker on the mean articulation of the 62 articulations and their articulatory effect on the ten oral vowels derived by means of linear regressions. The set of articulations obtained for each vowel and morphology feature by varying at regular steps the values of the morphology features were used as input of an acoustic plane wave propagation model. Corresponding formants F1 and F2 were extracted and analysed. The results, in general agreement with the literature, confirm the phoneme-specific influence of the morphology features, and emphasise the articulatory impact on the whole vocal tract when the morphology of one region only varies and their acoustic consequences.


Year: 2019
In session: Sprachproduktion
Pages: 312 to 319