Improved Estimation of Parkinsonian Vowel Quality through Acoustic Feature Assimilation

Figure 3

Scatter plots of subjective scores against recurrence period density entropy (RPDE) and harmonics-to-noise ratio (HNR) for the whole dataset. The x-axis on these plots is the averaged subjective score across the whole database, while the y-axis represents the acoustic measure. The correlation coefficient between the objective and subjective measures is presented in the text. (a) RPDE. (b) HNR.

(a)

(b)