Proeminência do Pico Cepstral nas disfonias comportamentais.

Abstract

Objective: The objective of the present study was to identify the values of the Prominence of the Smooth Cepstral Peak (CPPS) in the sustained vowel and in the chained speech in individuals with behavioral dysphonia compared to individuals without vocal complaints. Method: The study included 44 individuals of both sexes divided into two groups, the Experimental Group (EG) consisting of 22 individuals diagnosed with nodules or thickening in the middle third of vocal folds. The Control Group (CG) was also composed of 22 individuals, but without vocal complaints and classified with normal voice to the auditory-perceptual assessment. Voice recording was performed in an acoustic booth, with patients sitting comfortably. The vowel / a / was issued three times, in a prolonged way and the number counting from one to 10. Subsequently the voices were edited, remaining the medial three seconds of the vowel emission, and in relation to the number counting, stretches of silence and respiratory pauses between emissions were excluded. For the analysis of the voices, the PRAAT program was used. The CPPS results of the emission of the three sustained vowels were tabulated and the mean value between them was obtained. For data analysis, the paired T test was used. Results: The mean and standard deviation values of the CPPS for the SG were 13.95 (± 2.65) for the sustained vowel and 9.12 (± 1.74) for chained speech; for the CG group, it was 15.90 (± 2.10) for the sustained vowel and 12.02 (± 3.20) for chained speech. There was a difference in the CPPS values when the two groups were compared both in the issue of the vowel and in the counting of numbers. Conclusion: CPPS values are higher in vowel emission and lower in speech emission, in addition, in the presence of behavioral dysphonia the values are below CPPS values for individuals without vocal complaints in both emissions.