Table 3. Comparison of optimum ROC points of features with the highest AUC.
| Feature Name | SE | SP | Dist. to (0,1) | Threshold |
|---|---|---|---|---|
| MFCC-3 | 0.8386 | 0.8119 | 0.2479 | > 0.0520 |
| LPC coefficient-1 | 0.8206 | 0.8416 | 0.2393 | > −0.1760 |
| Tonality index | 0.7848 | 0.8515 | 0.2615 | < 0.7600 |
| LPC coefficient-2 | 0.7623 | 0.8020 | 0.3094 | < −0.1300 |
| Averaged PSD-17 | 0.7265 | 0.8416 | 0.3161 | < −0.9880 |
| Spectral irregularity | 0.7578 | 0.7822 | 0.3257 | > −0.7020 |
| WT coef STD-1 | 0.7578 | 0.7822 | 0.3257 | < −0.7230 |
| WT coef energy-1 | 0.7668 | 0.7673 | 0.3294 | < −0.9510 |
| Averaged PSD-16 | 0.7713 | 0.7723 | 0.3227 | < −0.9800 |
| LPC coef-3 | 0.6906 | 0.8119 | 0.3621 | > 0.6660 |
| Spectral brightness | 0.7803 | 0.7673 | 0.3200 | < −0.9120 |
| 95% freq roll-off | 0.7668 | 0.7475 | 0.3437 | < −0.2860 |