According to my Socratic intuition, a very great deal of human speech & communication would appear to be pure reflex, like when the family doctor tests the motor response in your lower leg, by giving the knee joint a gentle tap with his aesculapian hammer. This means you already know what to say, before you even say it; it must also follow, however, that you have once in some, mysterious way heard, what you may now be hearing, whether real sound is actually there, or just leftover noise ringing in your two ears. Thus both oral and auditory function ought to fall under neural activity, but it can nonetheless amount to something much bigger than simple, biochemical reaction—especially when you get into religious experience and the creative arts! (By the way, my lifelong studies have yet to unveil any general disagreement here.) So before you go see a highly exalted neurologist, remember to apply gingerly with those ear plugs you might want to use, topical antiseptic purchased for just one American dollar at your local drug store, to guard against resultant irritation & infection of the aural cavity!