Quantitative Comparison of Electroencephalography Systems Based on Measurement Results Between Medical and Wireless Consumers Devices
Syaukha Ahmad Risyad, Galih Restu Fardian Suwandi, Siti Nurul Khotimah, Freddy Haryanto

Nuclear Physics and Biophysics Research Group, Department of Physics, Faculty of Mathematics and Natural Sciences, Instutut Teknologi Bandung, Indonesia

Abstract

Electroencephalography is a recording technique for human brain^s electrical activity by the help of metal electrodes on the surface of the scalp. Electroencephalography devices record electrical analogue signal from the subject, subsequently convert it into a digital representation. This research was conducted to assess Emotiv EPOCX recording quality, by quantitatively comparing the recordings of Emotiv EPOCX with the recordings of Neuron-Spectrum-63, as a medical electroencephalography device. Recording data from Neuron-Spectrum-63 and Emotiv EPOCX were obtained from 16 male subjects in age 19-23 years old. Recording for both devices were done sequentially with similar methods of recording. The recording for Emotiv EPOCX was conducted first. Throughout the recording, subjects were asked to sit on a chair with closed and opened eyes for 30 seconds each. Subsequently, subjects took a verbal memory test. This research compared following parameters: peak PSD, FWHM from PSD, IPAF, IPAF shift, and absolute IPAF shift. Based on mentioned parameters, p-value, standard error, mean absolute percentage error (MAPE), and mean squared error (MSE) were also obtained. Based on IPAF, IPAF shift, and absolute IPAF shift results, it was concluded that Emotiv EPOCX was capable in reading EEG signals against time well. However, based on FWHM results, the quality of the EEG signals reading against time by Emotiv EPOCX was not as good as the reading by NeuronSpectrum-63. Based on PSD and FWHM results, it was concluded that Emotiv EPOCX was not capable in reading EEG signal amplitudes well compared to medical device.

Keywords: Electroencephalography, consumer grade, medical grade,

Topic: Biomedical Engineering