Table 3. Confusion matrix considering the classification of all eight classes of vocalizations using OPF with Manhattan distance and 90% of the samples for training set.
| True class[%] | |||||||||
| Alarm | Chirp | Loud-shrill | Phee | Seep | Trill | Tsik | |||
| Classified as[%] | Alarm | 78.4 | 0.0 | 4.7 | 4.1 | 4.3 | 0.7 | 2.5 | 0.0 |
| Chirp | 3.9 | 89.5 | 0.0 | 1.6 | 0.0 | 0.0 | 4.4 | 7.0 | |
| Loud-shrill | 5.9 | 0.0 | 75.3 | 5.9 | 0.0 | 19.2 | 0.0 | 0.4 | |
| Phee | 4.3 | 0.1 | 4.3 | 83.0 | 0.0 | 0.9 | 0.0 | 0.5 | |
| Seep | 5.7 | 0.0 | 0.0 | 0.0 | 90.6 | 0.0 | 8.3 | 0.0 | |
| Trill | 1.6 | 0.0 | 15.7 | 0.0 | 0.0 | 74.0 | 0.0 | 0.0 | |
| Tsik | 0.2 | 1.0 | 0.0 | 0.0 | 5.1 | 0.0 | 77.5 | 0.0 | |
| 0.0 | 9.4 | 0.0 | 5.4 | 0.0 | 5.2 | 7.3 | 92.1 | ||