earticle

영어

In this paper, we attempted in preparing high precision EEG signal measuring equipment. separation amplifier is essential to eliminate common line noise. So, our study were pointed at elevating the efficiency of eliminating noise, user safety and low noise characteristics. And converted data were Fast Fourier Transformed(FFT) with real time DSP (Digital Signal Processing). Steady-State Visually Evoked Potentials (SSVEP) are natural response signal associated with the visual stimuli with specific frequency. By using SSVEP, occipital lobe region is electrically activated as frequency form equivalent to stimuli frequency with bandwidth from 3.5Hz to 75Hz. In this paper, we propose an experimental paradigm for analyzing EEGs based on the properties of SSVEP. At first, an experiment is performed to extract frequency feature of EEGs that is measured from the image-based visual stimuli associated with specific objective with affordance. From the results, we can conclude that the developed active dry-electrode shows comparative performance to traditional Ag/AgCl electrodes. When considering the additional advantages of the developed electrodes, such as the convenience of use and ease of application to EEG measurement the developed electrode shows enormous potential as a replacement for the standard electrode for EEG monitoring in various ambulatory and hospital settings.