Fundamental Frequency and Formants Before and After Prolonged Voice Use in Teachers

摘要: Summary Objectives This study aimed to describe and correlate the fundamental frequency behavior first four formants before after exposure usual routinely prolonged voice use from teachers with over 4 years of experience in teaching. Study design The is observational transversal quantitative descriptive evaluations. Methods A total 28 female were subjected Screening Index for Voice Disorder (SIVD) recordings sustained vowel /a/ use. Data obtained about Descriptive analysis statistical processing performed P  ≤ 0.05 general sample groups according outcome SIVD (normal altered) evaluation period (morning or afternoon). Results average time was 176 minutes. There no difference any variables studied. Correlations positive similar across all assessments class, something not observed evaluations conducted In sample, altered afternoon groups, second formant before-class measurements seems interfere negatively fourth after-class measurements. Conclusions changes vocal occupational environment. However, F 1 2 measured class correlated inversely