Multidimensional voice assessment: the immediate effects of Lax Vox® in singers with voice complaints
Avaliação multidimensional da voz: efeitos imediatos do Lax Vox® em cantores com queixas vocais
Ruliano Santana da Matta; Marco Aurélio Rocha Santos; Elisa Meiti Ribeiro Lin Plec; Ana Cristina Côrtes Gama
Abstract
Purpose: to multidimensionally assess the effect of the Lax Vox® vocal technique on singers with voice complaints.
Methods: a comparative intrasubject study that assessed 30 singers - 13 males and 17 females, aged 18 to 55 years - who self-reported voice complaints and had voice problems symptoms. The participants were submitted to voice assessment with perceptive-auditory, acoustic, aerodynamic, and electroglottographic voice analysis, as well as laryngeal assessment with high-speed videolaryngoscopy. The participants were assessed at two moments: 1) at the beginning of the data collection; and 2) five minutes after performing the Lax Vox® vocal technique. The groups were compared with appropriate statistical tests, with a 5% significance level.
Results: in the acoustic analysis, there was an increase in the fundamental frequency for males, after using the Lax Vox® vocal technique. In the aerodynamic assessment, there was an increase in the airflow mean values during vocalization, as well as in aerodynamic power after using the Lax Vox® vocal technique in both groups.
Conclusion: the Lax Vox® vocal technique, in the studied singers with a complaint of dysphonia, promoted an increase in the fundamental frequency, for males. In the aerodynamic parameters, in both sexes, it promoted an increase in the airflow and aerodynamic power.
Keywords
Resumo
Objetivo: avaliar, de forma multidimensional, o efeito da técnica vocal Lax Vox® em cantores com queixas vocais.
Métodos: trata-se de um estudo comparativo intrassujeitos. Foram avaliados 30 cantores, sendo 13 homens e 17 mulheres, com idade entre 18 e 55 anos, que apresentaram queixa vocal autorreferida e presença de sintomas vocais. Os participantes foram submetidos à avaliação vocal pela análise perceptivo-auditiva, acústica, aerodinâmica e eletroglotográfica da voz, bem como à avaliação laríngea com a videolaringoscopia de alta velocidade. Os participantes foram avaliados em dois momentos: 1) no início da coleta; e 2) após cinco minutos de realização da técnica vocal Lax Vox®. Para comparação dos grupos foram utilizados teste estatísticos pertinentes, com nível de significância de 5%.
Resultados: na análise acústica houve aumento da frequência fundamental dos homens após o uso da técnica vocal Lax Vox®. Na avaliação aerodinâmica houve aumento dos valores da média do fluxo aéreo durante vocalização e da potência aerodinâmica após o uso da técnica vocal Lax Vox® em ambos os grupos.
Conclusão: a técnica vocal do Lax Vox® nos cantores com queixa de disfonia estudados promoveu um aumento da frequência fundamental nos homens. Nos parâmetros aerodinâmicos em ambos os sexos provocou um aumento do fluxo aéreo e da potência aerodinâmica.
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Referências
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Submetido em:
29/04/2020
Aceito em:
06/10/2020
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