Complex laryngeal manoeuvres occur during swallowing and singing register changes. These actions require an accurate synchronization of vocal fold adduction/abduction and the change of the larynx position. In case of dysfunction, this synchronization can be disturbed. The simultaneous assessment of glottal dynamics (typical EGG signal) and larynx position can be beneficial for the diagnosis of disordered voice and swallowing. Up to now, there isn’t the possibility to derive instantly these two information because of technology problems. We used a time-multiplex measurement approach of space-resolved transfer impedances through the larynx (MC-EGG). We developed a software Labview code for the visualization of the main waveforms in the study of the EGG signals. Moreover the data acquired by Labview have been used to create a theoretical algorithm for deriving the position of the larynx inside the neck. We verified the results of the algorithm for the 3D larynx movement comparing the data acquired with the values described in literature. The paths of the larynx and the displacement on the vertical and sagittal plans match the known ones for the emission of low/high notes and for the swallowing. Besides we have introduced the possibility to study the movement on the coronal plan (unexplored up to now) that can be a starting point for new analysis.

Derivation of Spatial Information from a Multi-Channel Electroglottograph

TRONCHIN, LAMBERTO;
2011

Abstract

Complex laryngeal manoeuvres occur during swallowing and singing register changes. These actions require an accurate synchronization of vocal fold adduction/abduction and the change of the larynx position. In case of dysfunction, this synchronization can be disturbed. The simultaneous assessment of glottal dynamics (typical EGG signal) and larynx position can be beneficial for the diagnosis of disordered voice and swallowing. Up to now, there isn’t the possibility to derive instantly these two information because of technology problems. We used a time-multiplex measurement approach of space-resolved transfer impedances through the larynx (MC-EGG). We developed a software Labview code for the visualization of the main waveforms in the study of the EGG signals. Moreover the data acquired by Labview have been used to create a theoretical algorithm for deriving the position of the larynx inside the neck. We verified the results of the algorithm for the 3D larynx movement comparing the data acquired with the values described in literature. The paths of the larynx and the displacement on the vertical and sagittal plans match the known ones for the emission of low/high notes and for the swallowing. Besides we have introduced the possibility to study the movement on the coronal plan (unexplored up to now) that can be a starting point for new analysis.
Proceedings of Forum Acusticum 2011
415
419
A. CASADEI; L. TRONCHIN; M. KOB
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/103091
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? ND
social impact