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External Validation of the Acoustic Voice Quality Index Version 03.01 With Extended Representativity
1Faculty of Medicine and Health Sciences, University of Antwerp, Belgium Medical School, Hochschule Fresenius University of Applied Sciences, Hamburg, Germany ben.barsties@t-online.de.
The Annals of Otology, Rhinology, and Laryngology
|March 9, 2016
Summary
The Acoustic Voice Quality Index (AVQI) is a validated tool for objectively measuring voice quality. This study confirms its accuracy and ecological validity in a large dataset, supporting its use in clinical practice.
Area of Science:
- Speech and Hearing Sciences
- Acoustic Analysis
- Voice Disorders
Background:
- The Acoustic Voice Quality Index (AVQI) quantifies voice quality objectively.
- A recent modification balanced AVQI's speech type proportions for improved ecological validity.
- External validation in a large dataset was needed.
Purpose of the Study:
- To externally validate the modified Acoustic Voice Quality Index (AVQI).
- To assess the diagnostic accuracy of AVQI in a large voice sample dataset.
Main Methods:
- 1058 voice samples were rated by 12 speech-language therapists.
- Concurrent validity was measured using Spearman rank-order correlation.
- Diagnostic accuracy was evaluated using receiver operating characteristics (ROC) analysis.
Main Results:
- A strong correlation (r = 0.815) was found between AVQI and expert auditory-perceptual ratings.
- AVQI explained 66.4% of the variation in perceived voice quality.
- The optimal diagnostic threshold for AVQI was determined to be 2.43 via ROC analysis.
Conclusions:
- The AVQI version 03.01 is externally validated as a robust measure.
- AVQI demonstrates diagnostic precision and ecological validity for objective voice quality assessment.
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