This invention is a mobile wearable device for measuring electromagnetic brain activity. It can be embodied in a headband or eyewear with soft prongs and/or teeth which protrude into and/or under the person's hair. The prongs and/or teeth can be made from a silicone material (such as polydimethylsiloxane) which has been impregnated, doped, coated, or embedded with conductive material (such as a metal and/or carbon) in order to provide consistent but comfortable contact with the person's head.