CC BY-NC-ND 4.0 · Int Arch Otorhinolaryngol 2023; 27(01): e10-e15
DOI: 10.1055/s-0041-1730428
Original Research

Acoustic Measurements of Speech and Voice in Men with Angle Class II, Division 1, Malocclusion

Flávia Viegas 
1   Department of Speech Therapy, Universidade Federal Fluminense, Nova Friburgo, RJ, Brazil
2   Faculty of Medicine, Universidade de São Paulo, São Paulo, Brazil
,
Zuleica Camargo 
3   Department of Philosophy, Communication, Language and Arts, Pontifícia Universidade Católica de São Paulo, São Paulo, SP, Brazil
,
Danieli Viegas 
4   Voice Postgraduate Course, Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
,
Glaucio Serra Guimarães 
5   Department of Dentistry, Universidade Federal Fluminense, Nova Friburgo, Rio de Janeiro, Brazil
,
Ronir Raggio Luiz 
6   Institute for Studies in Public Health, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
,
Fabio Ritto 
7   Department of Buccomaxillofacial Surgery and Traumatology, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
,
Marcia Simões-Zenari 
2   Faculty of Medicine, Universidade de São Paulo, São Paulo, Brazil
,
Katia Nemr 
2   Faculty of Medicine, Universidade de São Paulo, São Paulo, Brazil
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Abstract

Introduction The acoustic analysis of speech (measurements of the fundamental frequency and formant frequencies) of different vowels produced by speakers with the Angle class II, division 1, malocclusion can provide information about the relationship between articulatory and phonatory mechanisms in this type of maxillomandibular disproportion.

Objectives To investigate acoustic measurements related to the fundamental frequency (F0) and formant frequencies (F1 and F2) of the oral vowels of Brazilian Portuguese (BP) produced by male speakers with Angle class II, division 1, malocclusion (study group) and compare with men with Angle class I malocclusion (control group).

Methods In total, 60 men (20 with class II, 40 with class I) aged between 18 and 40 years were included in the study. Measurements of F0, F1 and F2 of the seven oral vowels of BP were estimated from the audio samples containing repetitions of carrier sentences. The statistical analysis was performed using the Student t-test and the effect size was calculated.

Results Significant differences (p-values) were detected for F0 values in five vowels ([e], [i], [ᴐ], [o] and [u]), and for F1 in vowels [a] and [ᴐ], with high levels for class II, division 1.

Conclusion Statistical differences were found in the F0 measurements with higher values in five of the seven vowels analysed in subjects with Angle class II, division 1. The formant frequencies showed differences only in F1 in two vowels with higher values in the study group. The data suggest that data on voice and speech production must be included in the protocol's assessment of patients with malocclusion.

Keywords

speech - voice - speech acoustics - malocclusion


Publication History

Received: 14 October 2019

Accepted: 03 March 2021

Article published online:
10 November 2022

© 2023. Fundação Otorrinolaringologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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