Noun
One who, or that which, articulates; as: (a) One who enunciates distinctly. (b) One who prepares and mounts skeletons. (c) An instrument to cure stammering.
Source: Webster's dictionaryBut glottis is not active articulator because it is only a space between vocal folds. Source: Internet
The lower lip is other active articulator. Source: Internet
The most important active articulator is the tongue as it is involved in the production of the majority of sounds. Source: Internet