Objective verification of focus strength using EEG signal

This study investigated the behaviour of N1 peak towards perceived sound levels in different range of frequencies. Three sound levels as perceived as Talk, Loud and Shout were examined. In 10 subjects, the results showed that in all frequency ranges (4000 Hz, 1000 Hz and 500 Hz) the peak of N1 waves have significantly reduced when stimulated by Talk level as compared to Loud and Shout. Insignificant reduction of N1 amplitude was increased as the stimulation intensity changed from Loud to Shout stimulation. In particular, the Shout stimulated response´s showed a constants N1 wave throughout stimulation in most of the subjects. The results showed that the focus strength could be measured by analyzing the degree of reduction of N1 wave. Therefore, the proposed method could be used as a framework towards clinical trial to measure the practicability of the memory booster pill or drugs on enhancing one´s focus strength or it just a placebo effect. In addition, we have seen that our focus could be manipulated by level of vibrant intensities. The finding could be used for developing a tool for driving awareness system.