This at Artificial Intelligence Lab, Jadavpur University. We

This section mainly involves in experimental framework and three following experiments: selection of brain regions, selection of EEG features, classifier performance.A.    Experimental frameworkOur experiment has been done at Artificial Intelligence Lab, Jadavpur University. We use 21-channel EEG device, having a sampling rate of 500 Hz and resolution of 100µ in our experiment. Experiment setup is shown in Figure 3. Ten healthy volunteers are participating in above experiments.

Out of the 10 healthy volunteer, 4 men and 6 women in the age group 18-32 years are selected. They are requested to sit on a comfortable chair with back- and elbow-rests in a rest condition without movement to eliminate possible contamination by movement-related artifacts.Here, in our experiment we use perfume, dettol, Vinegar (acetic acid, CH3COOH) and alcohol as stimulus with three concentration level (low, medium, and high).

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The concentration level should be maintained as Low (25% aroma with 75% water), medium (50% aroma and 50% water) and High (75% aroma and 25% water). All the volunteers are asked to take the odour samples with three different concentrations (low, medium, high) respectively with a 20 seconds time gap.To avoid the residual effect of the previous stimulus, a time-gap of 20 seconds is maintained between two successive presentations of odor stimuli. Each experiment with one sample presentation and EEG recordings for one subject together constitutes one trial.

Each trial is repeated 10 times over each subject. All the volunteers are asked to take the odour samples with three different concentrations (low, medium, high) respectively with a 20 seconds time gap.To avoid the residual effect of the previous stimulus, a time-gap of 20 seconds is maintained between two successive presentations of odor stimuli. Each experiment with one sample presentation and EEG recordings for one subject together constitutes one trial.

Each trial is repeated 10 times over each subject. The sequence of presentation of the odor concentrations randomly selected in