Electroencephalography Signal Power Spectral Density from Measurements in Room With and Without Faraday Cage: A Comparative Study Galih Restu Fardian Suwandi (a*), Siti Nurul Khotimah (a), Freddy Haryanto (a), Suprijadi (b)
(a) Nuclear Physics and Biophysics Research Group, Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung
Jl. Ganesha no.10 Bandung 40312 - Indonesia
*galih[at]fi.itb.ac.id
(b) Instrumentation and Computation Physics Research Group, Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung
Jl. Ganesha no.10 Bandung 40312 - Indonesia
Abstract
Electroencephalography (EEG) is a method for recording the brain^s electrical activity through electrodes placed on the scalp^s surface. This EEG has its problem, namely signal interference from outside the system or artifacts. Efforts to eliminate this signal interference can be made in various ways, including handling signal sources outside the system or removing interference signals during the EEG signal processing process. One way is to isolate the measurement room from signal interference using a Faraday cage. In this study, we will compare the results of EEG signal processing in the form of power spectral density (PSD) from measurements in a room without a Faraday cage and a room with a Faraday cage. We find that the average value of the change in PSD from the measurement results in the two rooms had a level of difference that varied between 0.7%-66%. The location of the electrodes that have a high difference value is the frontal and parietal areas.
Keywords: brainwaves, electroencephalography, Faraday cage, power spectral density
