Research Article
A Hybrid EMD-Wavelet EEG Feature Extraction Method for the Classification of Students’ Interest in the Mathematics Classroom
Table 1
The corresponding frequency obtained using db4 for 5 decomposition levels.
| Level | Wavelet coefficients | Frequency (Hz) | EEG rhythms | EEG frequency (Hz) |
| 1 | Dj=0 | 62.5–125 | — | — | 2 | Dj=1 | 31.25–62.5 | Gamma | >30 | 3 | Dj=2 | 15.62–31.25 | Beta | 13–30 | 4 | Dj=3 | 7.81–15.62 | Alpha | 8–12 | 5 | Dj=4 | 3.91–7.81 | Theta | 5–7 | 5 | Aj=4 | 1.91–3.91 | Delta | <4 |
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