Portable electroencephalography devices

A portable device for acquisition of electroencephalographic (EEG) signals emitted by a user, the device comprising:

• a flexible support intended to fit a localized region of a skull of the user;
• a set of sensors for detecting electrical signals generated by neuronal activity of the user, arranged on the support so as to form contacts with a scalp of the user when the device is worn by the user, each sensor comprising a plurality of conductive blades arranged parallel to one another, each conductive blade being concave at a zone of contact with the scalp, the conductive blades including at least one point configured to make initial contact with the scalp when the portable device is positioned on the skull, the at least one point being non-conductive;
• for each sensor, an electronic circuit for filtering and amplifying the electrical signals detected by the sensor, the electronic circuit being incorporated in the flexible support and forming with the sensor an active electrode;
• and
• a housing comprising an electronic system for processing the signals from each electronic circuit, the housing being linked mechanically to the flexible support to form, with the support, a means of attachment to a garment or accessory intended to be worn by the user.