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Vol. 70. Issue 4.
Pages 222-228 (July - August 2019)
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Vol. 70. Issue 4.
Pages 222-228 (July - August 2019)
Original article
DOI: 10.1016/j.otoeng.2018.04.005
Validation of the Measures of Cepstral Peak Prominence as a Measure of Dysphonia Severity in Spanish-Speaking Subjects
Validez de las medidas del pico cepstral para la valoración objetiva de la disfonía en sujetos de habla hispana
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Faustino Núñez-Batallaa,
Corresponding author
fjnunezb@gmail.com

Corresponding author.
, Noelia Cartón-Coronab, Gabriela Vasileb, Patricia García-Caboa, Laura Fernández-Vañesa, José Luis Llorente-Pendása
a Servicio de Otorrinolaringología, Hospital Universitario Central de Asturias, Oviedo, Spain
b Logopedia, Universidad de Oviedo, Oviedo, Spain
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Figures (1)
Tables (6)
Table 1. Diagnoses of the Group With Voice Disorders.
Table 2. Correlation Study in Women (Group With Dysphonia).
Table 3. Correlation Study in Men (Group With Dysphonia).
Table 4. Correlation Between Phrases and Vowel in Women.
Table 5. Correlation Between Phrases and Vowel in Men.
Table 6. Normative Values of the CPPS Mean.
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Abstract
Introduction and objectives

Perceptual rating of overall voice quality and other more specific perceptual dimensions is difficult, as such judgments depend on the listener's subjectivity. Thus, finding objective, valid, and accessible clinical measures to include in comprehensive voice evaluation protocols is a priority.

The purposes of this study were to (1) determine the diagnostic accuracy of a single acoustic measure, smoothed cepstral peak prominence (CPPS), to predict voice disorder status from sustained vowels and connected speech samples using the software Praat; (2) to determine the relationship between measures of CPPS and perceptual ratings of vocal quality; and (3) describe the normative values of CPPS.

Method

Measures of CPPS were obtained from connected speech and sustained vowel recordings of 72 Spanish-speaking subjects with voice disorders and 52 nondysphonic Spanish-speaking subjects with no vocal disorders using freely downloadable Praat software. IBM SPSS Statistics software version 23 was used to complete the statistical analyses.

Results

Results revealed a 70% sensitivity rate, a specificity rate of 85%. Estimated severity for sustained vowels and connected speech were strongly correlated and significantly associated with listener ratings of dysphonia severity.

Conclusions

A single acoustic measure of CPPS was highly predictive of voice disorder status using Praat software. Clinicians may consider using CPPS to complement clinical voice evaluation and screening protocols.

Keywords:
Acoustic measures
Smoothed cepstral peak prominence
Dysphonia
Analysis of dysphonia in speech and voice
Praat
Resumen
Introducción y objetivos

La fiabilidad de las calificaciones perceptuales de la calidad global de la voz y sus dimensiones específicas es difícil de alcanzar, por cuanto estos juicios dependen de la subjetividad del examinador. De este modo, la búsqueda de unas medidas clínicas que sean objetivas, válidas y accesibles es una prioridad para incluirlas en los protocolos de evaluación de la voz.

El propósito del presente estudio fue: 1) determinar la exactitud diagnóstica de un único parámetro acústico, la prominencia del pico cepstral suavizado (CPPS), para predecir la presencia y severidad de una disfonía en vocales sostenidas y habla conectada utilizando el programa Praat; 2) determinar la relación entre las medidas del CPPS y las calificaciones perceptuales de la calidad vocal; y 3) describir los valores normativos del CPPS.

Método

Se obtuvo el valor del CPPS de muestras vocales sostenidas y de habla conectada de 72 sujetos hispanohablantes con trastornos vocales y de 52 sujetos hispanohablantes sanos utilizando el programa Praat. Se llevó a cabo un estudio estadístico completo utilizando el programa SPSS de IBM versión 23.

Resultados

Se encontró una sensibilidad de un 70% y una especificidad de un 85%. La severidad estimada de la voz, tanto en vocal sostenida como en habla conectada, se correlacionó de forma importante con las calificaciones perceptuales de severidad global de la disfonía.

Conclusiones

Un parámetro acústico único, el CPPS calculado mediante el programa Praat, predice de forma importante el estatus de un trastorno vocal. Se considera la incorporación del CPPS para complementar la valoración clínica de la voz.

Palabras clave:
Medidas acústicas
Prominencia del pico cepstral suavizado
Disfonía
Análisis de la disfonía en el habla y voz
Praat

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