Observatorio de I+D+i UPM

Memorias de investigación
Capítulo de libro:
Characterizing Vocal Tract Centralization and Asymmetry in Amyotrophic Lateral Sclerosis
Áreas de investigación
  • Procesado y análisis de la señal
Amyotrohpic Lateral Sclerosis (ALS) is one of several neurodegenerative diseases which may benefit from speech processing for monitoring purposes. It is well known that ALS produces clear correlates in speech when the neuromotor units affecting oropharyngeal and mandibular muscles are suffering a specific deterioration. These correlates affect phonation, articulation, prosody and rhythm and can be precisely estimated using signal processing methods. This paper is oriented to give a measurement on how articulation is being affected by mapping the voiced fragments of running speech on the vowel triangle and proposing an asymmetry index which illustrates the degree of articulation deterioration. The index is based on the comparison of the actual vowel triangle gravity centre estimated from the patient?s utterance against a normative one, producing a deviation vector which illustrates the migration of the vowel space towards a neutral vowel near [æ]. An explanation for this fact may be found in the difficulties faced by the patient to activate precise articulation positions for the mandibular and hypoglossal muscles, and in the muscle atrophy in itself. Examples from a longitudinal study case are presented.
Edición del Libro
Editorial del Libro
Firenze University Press
Título del Libro
Proc. of MAVEBA 2013
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Esta actividad pertenece a memorias de investigación
  • Autor: Pedro Gomez Vilda (UPM)
  • Autor: Ana Rita Londral (Universidade de Lisboa)
  • Autor: Mamede de Carvalho (Universidade de Lisboa)
  • Autor: M. Victoria Rodellar Biarge (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Centro o Instituto I+D+i: Centro de tecnología Biomédica CTB
  • Departamento: Arquitectura y Tecnología de Sistemas Informáticos
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