Análise comparativa da amplitude de vibração das pregas vocais e do coeficiente de contato durante a emissão da vogal /ɛ/ prolongada e vibração sonorizada de lábios e língua

Comparison of Tongue and Lip Trills with Phonation of the Sustained Vowel /<i>ε</i>/ Regarding the Periodicity of the Electroglottographic Waveform and the Amplitude of the Electroglottographic Signal

“…In addition, the authors reported difficulty in synchronizing the flashes of light from the stroboscope with the vocal fold vibration during lip and tongue trills. The results of the present study corroborate the hypothesis that the difficulty in synchronizing the flashes of light from the stroboscope with the vocal fold vibration during lip and tongue trills is due to signal aperiodicity [20].…”

“…Cordeiro et al found that the closed quotient varies widely during trill exercises [20] [22]. In addition, the authors reported difficulty in synchronizing the flashes of light from the stroboscope with the vocal fold vibration during lip and tongue trills.…”

“…Such research shows that, when the tongue vibrates, the entire laryngeal framework vibrates, and the anteroposterior pharynx is constricted [19]. Furthermore, when the tongue or lips vibrate, the amplitude of the vibration of the mucosa in the vocal folds is higher than that of the sustained vowel [20], and the contact coefficient decreases [6] [21] and varies [22].…”