Normal subject | The proposed CEEMD approach | Traditional filtering method | ||||||
---|---|---|---|---|---|---|---|---|
Current strength of left ear stimulation | Current strength of right ear stimulation | Current strength of left ear stimulation | Current strength of right ear stimulation | |||||
Left auditory cortex (nAm) | Right auditory cortex (nAm) | Left auditory cortex (nAm) | Right auditory cortex (nAm) | Left auditory cortex (nAm) | Right auditory cortex (nAm) | Left auditory cortex (nAm) | Right auditory cortex (nAm) | |
N1 | 2.64 ± 0.93** | 5.32 ± 1.40* | 2.16 ± 0.96* | 2.79 ± 1.36 | 2.16 ± 0.73 | 5.14 ± 1.26 | 2.05 ± 0.57 | 2.70 ± 1.26 |
N2 | 2.59 ± 0.80** | 3.34 ± 1.02** | 2.00 ± 0.82** | 2.86 ± 1.06** | 1.47 ± 0.70 | 2.11 ± 0.64 | 1.54 ± 0.78 | 1.74 ± 0.65 |
N3 | 2.82 ± 1.00** | 5.44 ± 1.70* | 4.58 ± 1.34** | 4.15 ± 1.66** | 2.61 ± 1.01 | 5.04  ± 1.57 | 4.12  ± 1.15 | 3.36 ± 1.34 |
N4 | 3.78 ± 1.33** | 8.66 ± 1.64** | 4.97 ± 1.66** | 6.29 ± 1.41** | 2.37 ± 0.99 | 5.24 ± 1.18 | 4.01 ± 1.23 | 5.29 ± 1.19 |
N5 | 3.09 ± 1.15** | 5.77 ± 1.17** | 2.87 ± 0.80** | 6.02 ± 1.75** | 2.22 ± 0.76 | 4.33  ± 0.88 | 2.14  ± 0.62 | 4.27 ± 1.24 |
Mean ± std | 2.98 ± 1.11 | 5.68 ± 2.22 | 3.28 ± 1.66 | 4.39 ± 2.14 | 2.19 ± 1.07 | 4.33 ± 1.64 | 2.76 ± 1.40 | 3.39 ± 1.65 |