speaker vs articulator

speaker and articulator both are nouns.

Word	Noun	Adjective	Verb	Adverb
speaker	Yes	No	No	No
articulator	Yes	No	No	No

As nouns, articulator is a hypernym of speaker; that is, articulator is a word with a broader meaning than speaker:

speaker: someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)
articulator: someone who pronounces words

speaker (noun)	articulator (noun)
electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance	a movable speech organ
someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)	someone who pronounces words