Effects of caffeine on vocal acoustic and aerodynamic measures of adult females

Efeitos da cafeína na voz avaliados por medidas acústicas e aerodinâmicas em mulheres adultas

Abstracts

PURPOSE: To explore the effect of caffeine on voice, as evidenced by acoustic and aerodynamic measures, based on the fact that caffeine is considered to be a systemic dehydrating agent. METHODS: The participants in this investigation were 58 females ranging in age from 18 to 35 years, who self-reported normal vocal production. The participants abstained from caffeine ingestion for 24 hours and from ingesting foods and liquids for 12 hours prior to the test. They were randomly assigned to one of two groups, control and experimental, and were individually tested. After the preliminary phase, participants in the experimental group ingested a 100 mg caffeine tablet; participants in the control group ingested placebo, and followed the same protocol as the experimental group. All participants were retested 30 minutes after ingesting caffeine or placebo. RESULTS: Differences were not identified in any of the acoustic or aerodynamic measures across both groups. CONCLUSION: These results suggest that a conservative (100 mg) dosage of caffeine may not have an impact on vocal acoustics and aerodynamics.

Caffeine; Dehydration; Voice disorders

OBJETIVO: Explorar o efeito da cafeína na voz, evidenciado por medidas acústicas e aerodinâmicas, visto que a cafeína é considerada um agente desidratador. MÉTODOS: As participantes desta investigação foram 58 mulheres entre 18 e 35 anos de idade, que reportaram produção de voz normal. As participantes se abstiveram da ingestão de cafeína por 24 horas e de alimentos sólidos e líquidos por 12 horas antes do teste. Elas foram incluídas aleatoriamente em grupos controle e experimental e individualmente testadas. Após a fase preliminar, as integrantes do grupo experimental ingeriram um tablete de 100 mg de cafeína; o grupo controle ingeriu placebo e seguiu protocolo idêntico ao do grupo experimental. Todas as participantes foram retestadas 30 minutos após a administração de cafeína ou placebo. RESULTADOS: Não houve identificação de diferenças nas medidas em questão. CONCLUSÃO: Esses resultados sugerem que uma dose moderada (100 mg) de cafeína pode não ter impacto na acústica e aerodinâmica vocais.

Cafeína; Desidratação; Distúrbios da voz

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Publication Dates

• Publication in this collection
  19 July 2013
• Date of issue
  2013

History

• Received
  07 Sept 2012
• Accepted
  01 Aug 2013