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Investigation of the Immediate Effects of Humming on Vocal Fold Vibration Irregularity Using Electroglottography and High-speed Laryngoscopy in Patients With Organic Voice Disorders.

Authors :
Vlot C
Ogawa M
Hosokawa K
Iwahashi T
Kato C
Inohara H
Source :
Journal of voice : official journal of the Voice Foundation [J Voice] 2017 Jan; Vol. 31 (1), pp. 48-56. Date of Electronic Publication: 2016 May 10.
Publication Year :
2017

Abstract

Objectives: The study aimed to investigate whether humming can immediately improve the regularity of vocal fold vibration on electroglottography (EGG) and laryngeal high-speed digital imaging (HSDI) in patients with organic dysphonia (OD).<br />Methods: In a series of 49 dysphonic patients who were diagnosed to have benign mass lesions in the vocal folds and an equal number of non-dysphonic speakers, perturbation parameters were calculated on the acoustic (Ac) and EGG signals during natural and humming phonation. In addition, 11 OD patients and as many non-dysphonic speakers underwent simultaneous EGG and HSDI video recording under laryngofiberscopy while performing the two tasks. The perturbation parameters of the EGG signals as well as the glottal area waveforms (GAW), which were extracted from the HSDI movies, were calculated, and the correlations between both perturbation parameters were analyzed.<br />Results: Humming achieved significant improvements in the EGG perturbation parameters in both groups. More than half of the OD patients showed decreased EGG perturbation parameters to the level of those during natural phonation in the control group. With respect to the GAW analysis, moderate correlations were observed between both period and amplitude perturbation parameters (period: r = 0.63, amplitude: r = 0.41). Humming decreased both GAW perturbation parameters significantly in the OD and control subjects combined.<br />Conclusions: These results demonstrate that in OD patients, humming has a potential to improve voice quality by stabilizing the vocal fold oscillation, and suggest that humming can remove the functional component in the vocal disturbance instead of the mechanical effect of the mass lesions.<br /> (Copyright © 2017 The Voice Foundation. Published by Elsevier Inc. All rights reserved.)

Details

Language :
English
ISSN :
1873-4588
Volume :
31
Issue :
1
Database :
MEDLINE
Journal :
Journal of voice : official journal of the Voice Foundation
Publication Type :
Academic Journal
Accession number :
27178453
Full Text :
https://doi.org/10.1016/j.jvoice.2016.03.010