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Table 2 Average recognition results [%] of commonly used features subsets: acted speech (AS) and natural speech (NS)

From: Efficiency of chosen speech descriptors in relation to emotion recognition

Feature set k-NN AS k-NN NS SVM AS SVM NS
f 0 31.6 39.8 19.66 26.98
f 1f 3 38.8 39.5 16.88 27.5
Energy 30.4 47 29.95 46.87
LPC 36.7 57.8 29.91 60.51