Improved Estimation of Parkinsonian Vowel Quality through Acoustic Feature Assimilation

Figure 1

Averaged perceptual overall vowel quality scores off and on medication for the two PD groups: those whose premedication quality score was below a threshold (labeled as “poor” quality level) and those with a score above the threshold (labeled as “better” quality level). The threshold was set as the lower 95% confidence interval for the mean vowel quality rating of the control subjects.