Power Spectrum Density for different time
Bellow graphs taken for selecting which time is better for the study PSD of EEG signal. In the Fig 4.17 EEG data of channel taken for 1s. This data pass through the band pass filter for separating different frequency bands. For calculating the power spectrum density of each band we need to calculate the mean of all amplitudes present in the frequency band. In the delta band, from the observations data it is seen that the amplitude of channel 6 is high as comparing the other channel. This channel present on the frontal lobe of the brain. For the channel seven amplitude man of frequency band suddenly deceasing. The position of this electrode is the right hemisphere of the brain. For this observation frontal part of right hemisphere is dominant, however it is seen that the subject doing the left side work. Generally the right hemisphere of the brain sees the work of the left side and vice versa. Next channel 8 amplitude mean is high which is placed on central l...