Abstract: A wearable device to wear on a head of a user includes a flexible band generally shaped to correspond to the user's head, the band having at least a front portion to contact at least part of a frontal region of the user's head, a rear portion to contact at least part of an occipital region of the user's head, and at least one side portion extending between the front portion and the rear portion to contact at least part of an auricular region of the user's head. A deformable earpiece is connected to the at least one side portion, the deformable earpiece including conductive material to provide at least one bio-signal sensor to contact at least part of the auricular region of the user's head. At least one additional bio-signal sensor is disposed on the band to receive bio-signals from the user.