As you open your senses, you watch, you listen, you feel; you notice that the other has more dominance in the auditory channel: he speaks well, he allows others to finish their thoughts, he wants most that you listen to what he says.
He may be carefully dressed or perhaps not, wise or "caustic" depending on the desired communication. This person is an easy conversationalist in formal situations: family gatherings or professional environments, revealing his or her sense of humor in the context of a story rather than by making faces ar acting out a story. He easily and readily organizes group activities.
You will notice that he often access to auditory mental representations by looking side to side when speaking or thinking about things.