Estudo de caso: Avaliação da mudança do sinal eletroencefalográfico medido em ambiente susceptível a ruído versus em ambiente blindado

This paper aims to verify the quantitative behavior of the electroencephalographic signal in two environments: a room with noise sources and a shielded room. The EEG signals were collected by a signal amplifier in a neurologically healthy volunteer. Then, the spectral power of the EEG signal was estimated. All the classical brain rhythms were considered, as well as three rhythms related to frequencies greater than 30 Hz. The percentage variation of the power values was obtained taking into account these two environments. It was noted that artifacts in shielded locations tend to be attenuated.