Abstract
AbstractEVA was designed to study various speech production parameters.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.
Highlights
Voice assessment in speech therapy can be performed through auditory perceptual analysis, considered the gold standard in speech therapy, or through acoustic analysis, a set of measurements performed from computer-generated tracings[1].Acoustic analysis added objectivity to speech assessment
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
Summary
Voice assessment in speech therapy can be performed through auditory perceptual analysis, considered the gold standard in speech therapy, or through acoustic analysis, a set of measurements performed from computer-generated tracings[1].Acoustic analysis added objectivity to speech assessment. Electroglottography (EGG) is a non-invasive test that estimates the contact area variation between vocal folds as voice is produced[3]. It has been used in acoustic analysis since the 1940s in clinical and research settings[4]. EVA was designed to study parameters in speech production such as sound, intensity, aerodynamic measurements, to name a few. It is equipped with a series of sensors to measure these parameters, and offers improved diagnostic capabilities and enhanced patient follow-up in terms of surgery, drug therapy, and phototherapy outcome[5]
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