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Table 3 Fisher scores for tone discrimination using FrFT-MFCC. Orders are set according to pitch and "formants." MP denotes the main peaks of the LPC spectrum, and Pitch + MP refers to the technique presented in Section 4.2. when , the transforms are multiplied as explained in Section 4.3 (Figure 5(b)).

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

  a i e o u Average
Pitch + MP 2.46 4.76 6 4.77 6.55 4.91
Pitch + 2MP 2.25 3.91 5.53 6.94 8.74 5.47
Pitch + 3MP 2.27 4.53 5.67 6.23 11.2 5.99
Pitch + 5MP 2.44 4.52 5.85 6.00 12.0 6.16
Pitch + 10MP 2.11 4.21 6.85 4.13 12.7 5.99