Table 4: The Euclidean distance between the three clusters.

SNR (dB) −5 0 5 10 15 20   Cluster 1 Noise-only Noise-only Noise-only Noise-only Noise-only Noise-only Clusters 2 and 3             Noisy speech 8.5 12.7 15.9 19.1 22.8 25.5 Speech-only 5.4 9.9 12.9 17.2 21.3 24.3 Error 3.1 2.8 3.0 1.9 1.5 1.2