02Feb 2023
Automated Creak Differentiates Adductor Laryngeal Dystonia and Muscle Tension Dysphonia

Automated Creak Differentiates Adductor Laryngeal Dystonia and Muscle Tension Dysphonia

The purpose of this study was to determine whether automated estimates of vocal creak would differentiate speakers with adductor laryngeal dystonia (AdLD) from speakers with muscle tension dysphonia (MTD) and speakers without voice disorders. A Kruskal‐Wallis one‐way analysis of variance revealed a statistically significant effect of group on the % creak with a large effect size. Pairwise Wilcoxon tests revealed a statistically significant difference in % creak between speakers with AdLD and controls as well as between speakers with AdLD and MTD. Receiver operating characteristic curve analyses indicated that % creak differentiated AdLD from both controls and speakers with MTD with high sensitivity and specificity. As per the study results, the percentage of creak as calculated by an automated creak detector may be useful as a quantitative indicator of AdLD, which indicates the potential for use as a screening tool or to aid in a differential diagnosis.

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