An apparatus for detecting brain signal information from a human' s head, the apparatus comprising: a casing including an outer surface and an inner surface, the casing's shape defining a concaved interior region configured to receive a portion of the head, the casing defining a plurality of electrode openings , each electrode opening of the plurality of electrode openings comprising a hole extending between the outer surface and the inner surface; a conductive EMI shield material disposed either i) on the inner or outer surfaces of the casing, ii) in a wall of the casing, or iii) within the interior region defined by the casing, the conductive EMI shield configured to operate as an EMI shield; a conductive periphery disposed around at least portions of an inner periphery of the casing, wherein the inner periphery of the casing interfaces with the skin of the human and the conductive periphery is in electrical communication with the EMI shield, and in physical contact with the skin of the human; a conductive wire electrically coupled to the conductive EMI shield and configured to conduct energy received from the conductive EMI shield to a region of the human that is distinct from sites recording the brain signal information; and characterised in that the apparatus further comprises a chin strap coupled to the casing , wherein a) the chin strap includes the conductive wire that is electrically coupled to the conductive EMI shield and a conductive contact element that contacts the skin of the human beneath the chin or b) the chin strap is made of an electrically conductive material and is in electrical communication with the conductive EMI shield material and the skin of the user. a casing including an outer surface and an inner surface, the casing's shape defining a concaved interior region configured to receive a portion of the head, the casing defining a plurality of electrode openings , each electrode opening of the plurality of electrode openings comprising a hole extending between the outer surface and the inner surface; a conductive EMI shield material disposed either i) on the inner or outer surfaces of the casing, ii) in a wall of the casing, or iii) within the interior region defined by the casing, the conductive EMI shield configured to operate as an EMI shield; a conductive periphery disposed around at least portions of an inner periphery of the casing, wherein the inner periphery of the casing interfaces with the skin of the human and the conductive periphery is in electrical communication with the EMI shield, and in physical contact with the skin of the human; a conductive wire electrically coupled to the conductive EMI shield and configured to conduct energy received from the conductive EMI shield to a region of the human that is distinct from sites recording the brain signal information; and characterised in that the apparatus further comprises a chin strap coupled to the casing , wherein a) the chin strap includes the conductive wire that is electrically coupled to the conductive EMI shield and a conductive contact element that contacts the skin of the human beneath the chin or b) the chin strap is made of an electrically conductive material and is in electrical communication with the conductive EMI shield material and the skin of the user. a) the chin strap includes the conductive wire that is electrically coupled to the conductive EMI shield and a conductive contact element that contacts the skin of the human beneath the chin or b) the chin strap is made of an electrically conductive material and is in electrical communication with the conductive EMI shield material and the skin of the user. <EOS>