Medidas eletroglotográficas em falantes do português brasileiro por meio do Método Multiparamétrico de Avaliação Vocal Objetiva Assistida (EVA)

Abstract

Objective: This paper aims to define the mean values for electroglottography tests of Brazilian Portuguese speakers on EVA. Materials and Method:The voices of 20 men and 20 women without voice-related complaints were analyzed through electroglottography so as to obtain reference values for normality. Case study: this is a descriptive cross-sectional study. Results:The mean values for normal male voices were: F0 = 127.77 Hz; F0 coefficient of variation = 2.51%; absolute jitter = 1.707 Hz; relative average perturbation = 0.0083; jitter factor = 1.34%; jitter ratio = 13.45%; QF = 0.447. The values for female voices were: F0 = 204.87 Hz; F0 coefficient of variation = 1.58%; absolute jitter = 3.30Hz; relative average perturbation = 0.0102; jitter factor = 1.60%; jitter ratio = 16.23%; QF = 0.443. Wave type for the entire sample was categorized as tilted pulse.Conclusion: Statistically significant differences were found for gender on parameters average F0 and absolute jitter. While using acoustic analysis software, users must be based on parameters inherent to the software program when analyzing the collected data. Braz J Otorhinolaryngol. 2012;78(4):29-34. BJORL ORIGINAL ARTICLE

Análise das medidas eletroglotográficas da voz: padrões de normalidade para cantores por meio do programa CSL da Kay Pentax®

“…In this study, a statistically significant difference was observed with the sexes. Such findings corroborate the literature (11,14) , which also describes statistically significant values for mean f 0 between men and women. However, they disagree with a study by Guimarães and Abberton (9) , that found no statistically significant difference for this electroglotographic parameter.…”

“…The mean of the fundamental frequency found in the present study, for voice in the modal record of men (166.54 Hz), was higher than that found by Faria et al (14) , which was 127.77 Hz, and the one found by Ma et al (11) , which was 122.28 Hz. The average of the same parameter found for women in this study was 226.91 Hz, also showing to be higher than those found by Faria et al (14) (204. 87 Hz) and by Ma et al (11) (205.87 Hz).…”

“…Another study described in the literature shows that the average contact quotient was 42.52% and 45.56% for the study and control group, respectively, with no significant difference between groups (14) . Although there was no significant difference between groups for the mean CQ findings, the values found are close to the values found for CQ in women in our study.…”

“…Standardization aims to provide normative data on the compatibility, safety and variability of measurements between people. In the case of procedures that evaluate the voice, standardization has been emphasized in several studies (14,15) .…”

“…We can analyze the fundamental frequency of the vibration, the measures of disturbance of amplitude and shimmer, of disturbance of frequency and jitter, and the closing quotient of the vocal folds. Regarding the extraction of the values of the fundamental frequency, electroglotography is an accepted method to measure such parameters (14) . According to the literature, the fundamental frequency in EGG is easier to extract than in the acoustic analysis of the sound wave, as it represents clearer cycles (1) .…”