Cepstral analysis of normal and pathological voice in Colombian Spanish using the PRAAT program
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Abstract
Introduction: Subjective auditory-perceptual measurements, GRABS (Grade, Roughness, Asthenia, Breathiness y Strain) and CAPE-V (Consensus Auditory Perceptual Evaluation of Voice) have been the gold standard in voice evaluation. Recently, the smoothed cepstral peak prominence (CPPS) has been imposed as the acoustic measurement, objective and more robust for dysphonia severity. Objectives: The cepstral analysis of the PRAAT program was evaluated in patients with a pathological and non-pathological voice in Colombian Spanish speakers and the standard values for the CPPS in connected language (CPPSc), compared with the perceptual analysis of the voice (GRBAS). Methods: An observational, analytical, cross-sectional, multicenter diagnostic test was performed with 120 individuals. The voice was recorded and the CPPSc was analyzed with the PRAAT program. The auditory perceptual assessment was applied by two expert evaluators for the GRBAS scale. Results: The average age was 43.3 ± 18.1 years, 64.2% were women. The mean CPPSc in the dysphonic group was 6.40 dB, while in the group of normophonic individuals it was 8.54 dB, with significant differences between both groups (p=0.000). Sensitivity of 83.6% and specificity of 96.2%; for pathological voice was established in patients with CPPSc values less than 7.38 dB. A high correlation was found in the CPPSc value with the severity of dysphonia. Conclusions: The value of CPPSc through the Praat program is an efficient measure, due to its high validity, low cost and easy application to objectively evaluate dysphonia and its severity.
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ISSN: 0120-8411
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