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Spectrographic Voice Analysis Protocol (SAP): Convergent, Concurrent, and Accuracy Validity.

Allan Carlos França da Silva1, Luiz Medeiros de Araújo Lima-Filho1, Anna Alice Almeida1

  • 1Universidade Federal da Paraíba (UFPB), Decision Models and Health Program, João Pessoa, Paraíba, Brazil.

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The Spectrographic Voice Analysis Protocol (SAP) shows good accuracy in distinguishing between dysphonic and nondysphonic voices, demonstrating valid clinical potential for voice disorder assessment.

Keywords:
Acoustic analysisSpectrographyValidation studyVoiceVoice disorders

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Area of Science:

  • Speech-language pathology
  • Acoustic analysis of voice
  • Biomedical signal processing

Background:

  • Dysphonia, a voice disorder, requires accurate diagnostic tools.
  • Spectrographic analysis offers objective voice assessment methods.
  • The Spectrographic Voice Analysis Protocol (SAP) is a novel tool for voice analysis.

Purpose of the Study:

  • To validate the Spectrographic Voice Analysis Protocol (SAP).
  • To assess SAP's accuracy in differentiating dysphonic from nondysphonic individuals.
  • To determine the convergent and concurrent validity of SAP.

Main Methods:

  • 82 vowel /Ɛ/ samples and spectrograms were analyzed using SAP.
  • Convergent validity was assessed using Cepstral Peak Prominence (CPP) and smoothed (CPPS).
  • Concurrent validity was assessed using the General Grade of Vocal Deviation (GG).
  • Receiver Operating Characteristic (ROC) curve analysis evaluated diagnostic accuracy.

Main Results:

  • SAP total scores differed significantly between dysphonic and nondysphonic groups.
  • SAP showed moderate correlations with CPP, CPPS, and GG, indicating validity.
  • SAP demonstrated good discrimination accuracy (AUC=82.0%), with high sensitivity (91.7%) and PPV (93.7%).

Conclusions:

  • SAP exhibits convergent and concurrent validity for voice analysis.
  • SAP effectively discriminates between dysphonic and nondysphonic individuals.
  • Clinical use of SAP requires caution due to moderate specificity, NPV, and LR-, recommending combination with other assessments.