The value of the Acoustic Voice Quality Index as a measure of dysphonia severity in subjects speaking different languages
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The Acoustic Voice Quality Index (AVQI) is a relatively new clinical method to quantify dysphonia severity. Since it partially relies on continuous speech, its performance may vary with voice-related phonetic differences and thus across languages. The present investigation therefore assessed the AVQI’s performance in English, Dutch, German, and French. Fifty subjects were recorded reading sentences in the four languages, as well as producing a sustained vowel. These recordings were later edited to calculate the AVQI. The samples were also perceptually rated on overall dysphonia severity by three experienced voice clinicians. The AVQI’s cross-linguistic concurrent validity and diagnostic precision were assessed. The results support earlier data, and confirm good cross-linguistic validity and diagnostic accuracy. Although no statistical differences were observed between languages, the AVQI performed better in English and German and less well in French. These results validate the AVQI as a potentially robust and objective dysphonia severity measure across languages.
KeywordsDysphonia Clinical assessment Acoustic Voice Quality Index Different languages
The authors thank Dr. Gwen Van Nuffelen (Department of Communication Disorders, University Hospital of Antwerp, Belgium) for her contributions in the perceptual rating of the many concatenated voice samples.
The study followed the principles of the Declaration of Helsinki. The authors report no declarations of interest.
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