Bilabial(双唇音) The articulators are the two lips. We could say that the lower lip is the active articulator and the upper lip the passive articulator. though the upper lip usually moves too, at least a little.) English bilabial sounds include [p] [bl, and ml 2021/2/232021/2/23 9 Balabial （双唇音） • The articulators are the two lips. (We could say that the lower lip is the active articulator and the upper lip the passive articulator, though the upper lip usually moves too, at least a little.) English bilabial sounds include [p], [b], and [m]