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The Acoustic Breathiness Index (ABI): A Multivariate Acoustic Model for Breathiness

  • Ben Barsties v. Latoszek
    Correspondence
    Address correspondence and reprint requests to Ben Barsties v. Latoszek, Faculty of Medicine and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610 WILRIJK, Antwerp, Belgium.
    Affiliations
    Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium

    Institute of Health Studies, HAN University of Applied Sciences, Nijmegen, The Netherlands
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  • Youri Maryn
    Affiliations
    Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium

    European Institute for ORL, Sint-Augustinus Hospital, Antwerp, Belgium

    Faculty of Education, Health & Social Work, University College Ghent, Ghent, Belgium
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  • Ellen Gerrits
    Affiliations
    Faculty of Health Care, HU University of Applied Sciences Utrecht, Utrecht, The Netherlands

    Faculty of Humanities, University of Utrecht, Utrecht, The Netherlands

    Department of Otolaryngology, University Medical Center Utrecht, Utrecht, The Netherlands
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  • Marc De Bodt
    Affiliations
    Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium

    Department of Otorhinolaryngology and Head & Neck Surgery, Antwerp University Hospital, Antwerp, Belgium

    Faculty of Medicine & Health Sciences, University of Ghent, Ghent, Belgium
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Published:January 10, 2017DOI:https://doi.org/10.1016/j.jvoice.2016.11.017

      Summary

      Objective

      The evaluation of voice quality is a major component of voice assessment. The aim of the present study was to develop a new multivariate acoustic model for the evaluation of breathiness.

      Method

      Concatenated voice samples of continuous speech and the sustained vowel [a:] from 970 subjects with dysphonia and 88 vocally healthy subjects were perceptually judged for breathiness severity. Acoustic analyses were conducted on the same concatenated voice samples after removal of the non-voiced segments of the continuous speech sample. The development of an acoustic model for breathiness was based on stepwise multiple linear regression analysis. Concurrent validity, diagnostic accuracy, and cross validation were statistically verified on the basis of the Spearman rank-order correlation coefficient (rs), several estimates of the receiver operating characteristics plus the likelihood ratio, and iterated internal cross correlations.

      Results

      Ratings of breathiness from four experts with moderate reliability were used. Stepwise multiple regression analysis yielded a nine-variable acoustic model for the multiparametric measurement of breathiness (Acoustic Breathiness Index [ABI]). A strong correlation was found between ABI and auditory-perceptual rating (rs = 0.840, P = 0.000). The cross correlations confirmed a comparably high degree of association. Additionally, the receiver operating characteristics and likelihood ratio results showed the best diagnostic outcome at a threshold of ABI = 3.44 with a sensitivity of 82.4% and a specificity of 92.9%.

      Conclusions

      This study developed a new acoustic multivariate correlate for the evaluation of breathiness in voice. The ABI model showed valid and robust results and is therefore proposed as a new acoustic index for the evaluation of breathiness.

      Key Words

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