Lombard Effect in Individuals With Nonphonotraumatic Vocal Hyperfunction: Impact on Acoustic, Aerodynamic, and Vocal Fold Vibratory Parameters.

Autor: Castro C; Department of Electronic Engineering, Universidad Técnica Federico Santa María, Valparaíso, Chile.; Department of Speech and Language Pathology, Universidad de Valparaíso, Chile.; Department of Speech and Language Pathology, Universidad de Chile, Santiago., Prado P; Latin American Brain Health Institute (BrainLat), Universidad Adolfo Ibáñez, Santiago, Chile., Espinoza VM; Department of Sound, Universidad de Chile, Santiago., Testart A; Department of Speech and Language Pathology, Universidad de Playa Ancha, Valparaíso, Chile., Marfull D; Department of Speech and Language Pathology, Universidad de Valparaíso, Chile., Manriquez R; Department of Electronic Engineering, Universidad Técnica Federico Santa María, Valparaíso, Chile., Stepp CE; Department of Speech, Language, and Hearing Sciences, Boston University, MA.; Department of Biomedical Engineering, Boston University, MA.; Department of Otolaryngology-Head and Neck Surgery, Boston University, MA., Mehta DD; Center for Laryngeal Surgery & Voice Rehabilitation, Massachusetts General Hospital, Boston.; Department of Surgery, Harvard Medical School, Boston, MA.; MGH Institute of Health Professions, Boston, MA., Hillman RE; Center for Laryngeal Surgery & Voice Rehabilitation, Massachusetts General Hospital, Boston.; Department of Surgery, Harvard Medical School, Boston, MA.; MGH Institute of Health Professions, Boston, MA., Zañartu M; Department of Electronic Engineering, Universidad Técnica Federico Santa María, Valparaíso, Chile.
Jazyk: angličtina
Zdroj: Journal of speech, language, and hearing research : JSLHR [J Speech Lang Hear Res] 2022 Aug 17; Vol. 65 (8), pp. 2881-2895. Date of Electronic Publication: 2022 Aug 05.
DOI: 10.1044/2022_JSLHR-21-00508
Abstrakt: Purpose: This exploratory study aims to investigate variations in voice production in the presence of background noise (Lombard effect) in individuals with nonphonotraumatic vocal hyperfunction (NPVH) and individuals with typical voices using acoustic, aerodynamic, and vocal fold vibratory measures of phonatory function.
Method: Nineteen participants with NPVH and 19 participants with typical voices produced simple vocal tasks in three sequential background conditions: baseline (in quiet), Lombard (in noise), and recovery (5 min after removing the noise). The Lombard condition consisted of speech-shaped noise at 80 dB SPL through audiometric headphones. Acoustic measures from a microphone, glottal aerodynamic parameters estimated from the oral airflow measured with a circumferentially vented pneumotachograph mask, and vocal fold vibratory parameters from high-speed videoendoscopy were analyzed.
Results: During the Lombard condition, both groups exhibited a decrease in open quotient and increases in sound pressure level, peak-to-peak glottal airflow, maximum flow declination rate, and subglottal pressure. During the recovery condition, the acoustic and aerodynamic measures of individuals with typical voices returned to those of the baseline condition; however, recovery measures for individuals with NPVH did not return to baseline values.
Conclusions: As expected, individuals with NPVH and participants with typical voices exhibited a Lombard effect in the presence of elevated background noise levels. During the recovery condition, individuals with NPVH did not return to their baseline state, pointing to a persistence of the Lombard effect after noise removal. This behavior could be related to disruptions in laryngeal motor control and may play a role in the etiology of NPVH.
Supplemental Material: https://doi.org/10.23641/asha.20415600.
Databáze: MEDLINE
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