RESUMO
Introduction: The understanding of normal vocal production is essential to guide any voice professional as it is fundamental to understand the effects of the posterior glottal gap on the vocal quality. Objective: The aim of the present study was to verify the association between glottic closure, acoustic parameters, and some characteristics of the videolaryngostroboscopy of young women without vocal complaints nor laryngeal disorders. Methods: This is a cross-sectional study with 56 women between 20 and 30 years old who underwent videolaryngostroboscopy. The acoustic parameters of the vowel /a:/ were analyzed using the Praat software, Release 4.6.10 (Paul Boersman and David Weenik, Amsterdam, Netherlands). Statistical Analysis: The chi-squared, Fischer, and Kruskall-Wallis tests were applied, with 5% significance. Results: Significant occurrence of posterior glottal gap (85.71%, p < 0.001), of normal vocal folds vibration amplitude (82.14%, p < 0.001), and of absence of significant constriction of the laryngeal vestibule (98.21%, p < 0.001); no significant association of the glottic closure with the vocal acoustic parameters; no significant association of glottic closure, vocal folds vibration amplitude, and constriction of the laryngeal vestibule. Conclusion: There was a predominance of posterior glottal gap, normal vocal folds vibration amplitude, and absence of laryngeal vestibule constriction, and no relation with the acoustic parameters, suggesting that the posterior glottal gap did not generate impact on the vocal production of the young adult women studied (AU)
Assuntos
Humanos , Feminino , Adulto , Voz/fisiologia , Glote/fisiologia , Acústica da Fala , Prega Vocal/fisiologia , Qualidade da Voz/fisiologia , Estudos Transversais , Laringoscopia/métodos , Laringe/fisiologiaRESUMO
OBJECTIVE: This study aims to compare acoustic characteristics of classical and popular female singers' vocal performances in Heitor Villa-Lobos' Melodia Sentimental (Sentimental Melody). METHOD: Long-term average spectrum acoustic analysis and long-term voice onset time (VOT) were performed for two consonants /d/ in the first six verses of Melodia Sentimental sang by 10 professional singers: five classical (GC) and five popular (GP). RESULTS: Classical singers presented prominence in the region of the frequencies between 2.5 and 3.5 kHz, not observed in the majority of the popular singers' group. The GC group showed lighter spectral decline curves and the numerical value of decline was also lower. Classical singers presented lower long-term voice onset time values, which indicates a longer period of glottic closure. CONCLUSION: Acoustic analysis revealed that classical singers have more energy in glottic closure associated with a shorter duration of glottic coaptation.
Assuntos
Acústica , Emoções , Glote/fisiologia , Canto , Qualidade da Voz , Adulto , Feminino , Humanos , Pessoa de Meia-Idade , Espectrografia do Som , Fatores de TempoRESUMO
PURPOSE: The present study aimed to observe whether physiological warm-up and traditional singing warm-up differently affect aerodynamic, electroglottographic, acoustic, and self-perceived parameters of voice in Contemporary Commercial Music singers. METHODS: Thirty subjects were asked to perform a 15-minute session of vocal warm-up. They were randomly assigned to one of two types of vocal warm-up: physiological (based on semi-occluded exercises) or traditional (singing warm-up based on open vowel [a:]). Aerodynamic, electroglottographic, acoustic, and self-perceived voice quality assessments were carried out before (pre) and after (post) warm-up. RESULTS: No significant differences were found when comparing both types of vocal warm-up methods, either in subjective or in objective measures. Furthermore, the main positive effect observed in both groups when comparing pre and post conditions was a better self-reported quality of voice. Additionally, significant differences were observed for sound pressure level (decrease), glottal airflow (increase), and aerodynamic efficiency (decrease) in the traditional warm-up group. CONCLUSION: Both traditional and physiological warm-ups produce favorable voice sensations. Moreover, there are no evident differences in aerodynamic and electroglottographic variables when comparing both types of vocal warm-ups. Some changes after traditional warm-up (decreased intensity, increased airflow, and decreased aerodynamic efficiency) could imply an early stage of vocal fatigue.
Assuntos
Glote/fisiologia , Ocupações , Fonação , Canto , Qualidade da Voz , Treinamento da Voz , Acústica , Adulto , Percepção Auditiva , Eletrodiagnóstico , Feminino , Humanos , Masculino , Autoimagem , Adulto JovemRESUMO
OBJECTIVES: We conducted a study to obtain quantitative parameters of the vocal dynamic using high-speed videolaryngoscopy and to characterize the vocal fold vibration pattern of healthy individuals by analyzing glottal area waveforms and high-speed kymography. METHODS: Laryngeal images of 45 healthy individuals were captured using high-speed videolaryngoscopy. The open and speed quotients of the glottal area waveforms and high-speed kymography were obtained and statistically analyzed according to the gender of each individual. RESULTS: Glottal area waveforms revealed average values of 0.85 and 1.16 for open and speed quotients, respectively, for women, and 0.70 and 1.19 for men. Using high-speed kymography, quantitative parameters of open and speed quotients for women were 0.62 and 1.02, respectively, and for men were 0.57 and 1.12. By gender, a significant statistical difference emerged for open quotients obtained from both glottal area waveforms (P = 0.004) and high-speed kymography (P = 0.013). CONCLUSION: Obtained by using computational tools specifically for analyzing laryngeal images from high-speed videolaryngoscopy, quantitative parameters of glottal area waveforms and high-speed kymography in healthy individuals provide reference data and normality for future studies.
Assuntos
Glote/fisiologia , Quimografia , Laringoscopia , Fonação , Gravação em Vídeo , Prega Vocal/fisiologia , Adolescente , Adulto , Fenômenos Biomecânicos , Brasil , Feminino , Glote/anatomia & histologia , Voluntários Saudáveis , Humanos , Interpretação de Imagem Assistida por Computador , Quimografia/normas , Laringoscopia/normas , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Padrões de Referência , Fatores Sexuais , Fatores de Tempo , Vibração , Gravação em Vídeo/normas , Prega Vocal/anatomia & histologia , Adulto JovemRESUMO
BACKGROUND: Acoustic analysis of voice (AAV) and electroglottography (EGG) have been used for assessing vocal quality in patients with voice disorders. The effectiveness of these procedures for detecting mild disturbances in vocal quality in elite vocal performers has been controversial. OBJECTIVE: To compare acoustic parameters obtained by AAV and EGG before and after vocal training to determine the effectiveness of these procedures for detecting vocal improvements in elite vocal performers. MATERIALS AND METHODS: Thirty-three elite vocal performers were studied. The study group included 14 males and 19 females, ages 18-40 years, without a history of voice disorders. Acoustic parameters were obtained through AAV and EGG before and after vocal training using the Linklater method. RESULTS: Nonsignificant differences (P > 0.05) were found between values of fundamental frequency (F0), shimmer, and jitter obtained by both procedures before vocal training. Mean F0 was similar after vocal training. Jitter percentage as measured by AAV showed nonsignificant differences (P > 0.05) before and after vocal training. Shimmer percentage as measured by AAV demonstrated a significant reduction (P < 0.05) after vocal training. As measured by EGG after vocal training, shimmer and jitter were significantly reduced (P < 0.05); open quotient was significantly increased (P < 0.05); and irregularity was significantly reduced (P < 0.05). CONCLUSIONS: AAV and EGG were effective for detecting improvements in vocal function after vocal training in male and female elite vocal performers undergoing vocal training. EGG demonstrated better efficacy for detecting improvements and provided additional parameters as compared to AAV.
Assuntos
Acústica , Eletrodiagnóstico , Glote/fisiologia , Fonação , Canto , Qualidade da Voz , Treinamento da Voz , Adolescente , Adulto , Feminino , Humanos , Masculino , Estudos Prospectivos , Processamento de Sinais Assistido por Computador , Adulto JovemRESUMO
Objetivo : Verificar a relação entre distúrbio de voz e sintomas de disfunção temporomandibular em professores do ensino fundamental. Métodos : Participaram deste estudo 138 professores, 96 do gênero feminino e 42 do gênero masculino, com média de idade de 38 anos. Os professores responderam questionário, com cinco questões de autorreferência à presença de alteração de voz no presente e sintomas de disfunção temporomandibular. Os dados foram analisados por meio de teste de associação (Qui-quadrado) para verificar associação entre distúrbio de voz e sintomas de disfunção temporomandibular, além da relação de cada um deles quanto a gênero e idade. Resultados : Os sintomas de disfunção temporomandibular relatados pelos professores foram: dor de cabeça ou na face, dor ao final do dia e dor ao falar muito. Os resultados mostraram diferença significativa para os sintomas de dor ao falar muito, dor ao final do dia e estalido na articulação temporomandibular, em professores sem distúrbio de voz. Houve diferença significativa para o gênero feminino, quanto a distúrbio de voz. Constatou-se maior número de autorreferência à disfunção temporomandibular, quando comparado ao distúrbio de voz, com diferença significativa para o gênero feminino. Conclusão : Os achados apontam associação estatística entre distúrbio de voz e sintomas de disfunção temporomandibular, em professores. Destaca-se a importância de outras pesquisas com avaliação clínica integrada, para aprofundar dados referentes a sintomas vocais e DTM, em relação à idade. .
Purpose : To verify the relationship between voice disorder and temporomandibular dysfunction (TMD) in elementary and middle school teachers. Methods : The participants of this study were 138 teachers - 96 women and 42 men, with a mean age of 38 years. The teachers responded to a questionnaire with five questions on voice disorder and temporomandibular dysfunction symptoms. The data were analyzed using an association test (Chi-square) to verify the association between voice disorder and temporomandibular dysfunction symptoms, as well as the relationship of the symptoms with sex and age. Results : The temporomandibular dysfunction symptoms reported by the teachers, from the most to least frequently mentioned, were as follows: headache or facial pain, pain at the end of the day, and pain when speaking excessively. The results showed a statistically significant difference for the symptom pain when speaking excessively, pain at the end of the day, and temporomandibular joint snap in teachers without voice disorder. A statistically significant difference was observed for the female sex, regarding temporomandibular dysfunction. Temporomandibular dysfunction was more frequently reported than voice disorder, with higher incidence in female than in male teachers. Conclusion : The findings showed a statistical association between voice disorder and temporomandibular dysfunction in teachers. Further studies with integrated clinical assessment on the relationship between voice symptoms and TMD in different age groups are warranted. .
Assuntos
Humanos , Masculino , Feminino , Adulto , Docentes , Sistema Estomatognático/fisiologia , Síndrome da Disfunção da Articulação Temporomandibular/etiologia , Distúrbios da Voz/etiologia , Transtornos da Articulação , Percepção Auditiva , Dor Facial , Glote/fisiologia , Inquéritos e QuestionáriosRESUMO
OBJECTIVE: The present study aimed to investigate the vocal tract and glottal function during and after phonation into a tube and a stirring straw. METHODS: A male classically trained singer was assessed. Computerized tomography (CT) was performed when the subject produced [a:] at comfortable speaking pitch, phonated into the resonance tube and when repeating [a:] after the exercise. Similar procedure was performed with a narrow straw after 15 minutes silence. Anatomic distances and area measures were obtained from CT midsagittal and transversal images. Acoustic, perceptual, electroglottographic (EGG), and subglottic pressure measures were also obtained. RESULTS: During and after phonation into the tube or straw, the velum closed the nasal passage better, the larynx position lowered, and hypopharynx area widened. Moreover, the ratio between the inlet of the lower pharynx and the outlet of the epilaryngeal tube became larger during and after tube/straw phonation. Acoustic results revealed a stronger spectral prominence in the singer/speaker's formant cluster region after exercising. Listening test demonstrated better voice quality after straw/tube than before. Contact quotient derived from EGG decreased during both tube and straw and remained lower after exercising. Subglottic pressure increased during straw and remained somewhat higher after it. CONCLUSION: CT and acoustic results indicated that vocal exercises with increased vocal tract impedance lead to increased vocal efficiency and economy. One of the major changes was the more prominent singer's/speaker's formant cluster. Vocal tract and glottal modifications were more prominent during and after straw exercising compared with tube phonation.
Assuntos
Glote/fisiologia , Fonação , Canto , Prega Vocal/fisiologia , Qualidade da Voz , Treinamento da Voz , Acústica , Adulto , Percepção Auditiva , Fenômenos Biomecânicos , Eletrodiagnóstico , Feminino , Glote/diagnóstico por imagem , Humanos , Julgamento , Masculino , Pressão , Espectrografia do Som , Tomografia Computadorizada Espiral , Prega Vocal/diagnóstico por imagemRESUMO
BACKGROUND: Previous studies with long-term average spectrum (LTAS) showed the importance of the glottal source for understanding the projected voices of actresses. In this study, electroglottographic (EGG) analysis was used to investigate the contribution of the glottal source to the projected voice, comparing actresses and nonactresses' voices, in different levels of intensity. METHOD: Thirty actresses and 30 nonactresses sustained vowels in habitual, moderate, and loud intensity levels. The EGG variables were contact quotient (CQ), closing quotient (QCQ), and opening quotient (QOQ). Other variables were sound pressure level (SPL) and fundamental frequency (F0). A KayPENTAX EGG was used. Variables were inputted in a general linear model. RESULTS/DISCUSSION: Actresses showed significantly higher values for SPL, in all levels, and both groups increased SPL significantly while changing from habitual to moderate and further to loud. There were no significant differences between groups for EGG quotients. There were significant differences between the levels only for F0 and CQ for both groups. CONCLUSION: SPL was significantly higher among actresses in all intensity levels, but in the EGG analysis, no differences were found. This apparently weak contribution of the glottal source in the supposedly projected voices of actresses, contrary to previous LTAS studies, might be because of a higher subglottal pressure or perhaps greater vocal tract contribution in SPL. Results from the present study suggest that trained subjects did not produce a significant higher SPL than untrained individuals by increasing the cost in terms of higher vocal fold collision and hence more impact stress. Future researches should explore the difference between trained and nontrained voices by aerodynamic measurements to evaluate the relationship between physiologic findings and the acoustic and EGG data. Moreover, further studies should consider both types of vocal tasks, sustained vowel and running speech, for both EGG and LTAS analysis.
Assuntos
Eletrodiagnóstico , Glote/fisiologia , Fonação , Acústica da Fala , Qualidade da Voz , Adulto , Fenômenos Biomecânicos , Feminino , Humanos , Modelos Lineares , Pessoa de Meia-Idade , Pressão , Adulto JovemRESUMO
UNLABELLED: EVA 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 FO and absolute jitter. While using acoustic analysis software, users must be based on parameters inherent to the software program when analyzing the collected data.
Assuntos
Glote/fisiologia , Espectrografia do Som/instrumentação , Qualidade da Voz/fisiologia , Adolescente , Adulto , Brasil , Estudos de Coortes , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Valores de Referência , Espectrografia do Som/métodos , Adulto JovemRESUMO
O Método Multiparamétrico de Avaliação Vocal Objetiva Assistida (EVA) foi projetado para o estudo da maioria dos parâmetros de produção da fala. OBJETIVO: Definir as medidas médias dos parâmetros eletroglotográficos em falantes do português brasileiro para o EVA. MATERIAL E MÉTODO: Foram analisadas 40 vozes, 20 homens e 20 mulheres sem queixa vocal, extraindo-se as medidas eletroglotográficas, a fim de obter valores de referência de normalidade. Estudo de caso: estudo descritivo com corte transversal. RESULTADOS: Os valores médios de normalidade encontrados nas vozes masculinas foram: F0 = 127,77 Hz, coeficiente de variação de F0 = 2,51%, jitter absoluto = 1,707 Hz, perturbação média relativa = 0,0083, jitter factor = 1,34%, jitter ratio = 13,45%, e QF = 0,447. Para vozes femininas, foram: F0 = 204,87 Hz, coeficiente de variação de F0 = 1,58%, jitterabsoluto = 3,30 Hz, perturbação média relativa = 0,0102, jitter factor = 1,60%, jitter ratio = 16,23%, e QF = 0,443. O tipo de onda foi em 100% da amostra classificada como pulso inclinado em ambos os gêneros. CONCLUSÃO: Houve diferença estatisticamente significante em relação ao gênero para os parâmetros de média F0 e jitterabsoluto. Ao utilizar um programa de análise acústica, os usuários devem basear-se em parâmetros inerentes ao próprio programa para realizar a análise dos dados coletados.
EVA 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 FO and absolute jitter. While using acoustic analysis software, users must be based on parameters inherent to the software program when analyzing the collected data.