EEG is a comprehensive manifestation of cerebral cortex or subcortical neurons moving through the skull and scalp. The skull and scalp act as low-pass filters, so the EEG signal has relatively narrow bandwidth range (0-80Hz), compared to othersignals. And the acquired signal is more susceptible to interference from the external environment.

The first step in the analysis of EEG signals is to collect EEG signals, which requires safe, stable and reliable EEG equipment. This project is our attempt to build an adjustable EEG cap that can be in close contact with wearer’s head (less displacement, less interference). Also, a novel electrode is designed to lower the impedance and reduce polarization.

Microstructure of the electrode

The upper storage structure (Normal Saline) ensures a long-term moist status of the lower grey electrode, and the black component is a supporting mechanism. Therefore, the electrode can closely contact the skin without water flowing around, and it can be easily cleaned compared to gel.






The skeleton of the EEG cap is 3D printed and then assembled with nylon fabric. The sliding mechanism provides an easy mounting process for various testees.






Cap design: Tianhao, Zheng

Electrode design: Tianhao, Zheng

Image rendering: Yong

3D printing: Yong