Advances in Clinical Voice Quality Analysis with VOXplot

Author:

Barsties v. Latoszek Ben1ORCID,Mayer Jörg2,Watts Christopher R.3ORCID,Lehnert Bernhard4

Affiliation:

1. Speech-Language Pathology, SRH University of Applied Health Sciences, 40210 Düsseldorf, Germany

2. Institute for Natural Language Processing, University of Stuttgart, 70049 Stuttgart, Germany

3. Harris College of Nursing & Health Sciences, Texas Christian University, Fort Worth, TX 76109, USA

4. Department of Oto-Rhino-Laryngology, Phoniatrics and Pedaudiology Division, University Medicine Greifswald, 17475 Greifswald, Germany

Abstract

Background: The assessment of voice quality can be evaluated perceptually with standard clinical practice, also including acoustic evaluation of digital voice recordings to validate and further interpret perceptual judgments. The goal of the present study was to determine the strongest acoustic voice quality parameters for perceived hoarseness and breathiness when analyzing the sustained vowel [a:] using a new clinical acoustic tool, the VOXplot software. Methods: A total of 218 voice samples of individuals with and without voice disorders were applied to perceptual and acoustic analyses. Overall, 13 single acoustic parameters were included to determine validity aspects in relation to perceptions of hoarseness and breathiness. Results: Four single acoustic measures could be clearly associated with perceptions of hoarseness or breathiness. For hoarseness, the harmonics-to-noise ratio (HNR) and pitch perturbation quotient with a smoothing factor of five periods (PPQ5), and, for breathiness, the smoothed cepstral peak prominence (CPPS) and the glottal-to-noise excitation ratio (GNE) were shown to be highly valid, with a significant difference being demonstrated for each of the other perceptual voice quality aspects. Conclusions: Two acoustic measures, the HNR and the PPQ5, were both strongly associated with perceptions of hoarseness and were able to discriminate hoarseness from breathiness with good confidence. Two other acoustic measures, the CPPS and the GNE, were both strongly associated with perceptions of breathiness and were able to discriminate breathiness from hoarseness with good confidence.

Publisher

MDPI AG

Subject

General Medicine

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