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Table 12 Fisher scores for vowel discrimination using FrFT-MFCC. Orders are set according to N times of pitch rate, and then using multiorder multiplication (Section 4.3).

From: Pitch- and Formant-Based Order Adaptation of the Fractional Fourier Transform and Its Application to Speech Recognition

  1 2 3 4 All
10.37 15.15 19.11 12.68 14.03
9.57 13.93 14.37 10.86 12.18
7.74 11.42 9.73 8.61 9.34
4.77 8.20 6.08 5.83 6.09