There is what is known as the Mental Medium. These Mediums are clairvoyant and clairsensient and rarely but sometimes clairaudient. Being clairaudient is perhaps the rarest of all gifts. The ability to hear Spirit is a gift that simplifies the Medium's interpretation. It is a rare gift, of great accuracy and doesn't need interpretation.
All Mediums are psychic.
We all hear words from time to time. Mediums specialize in knowing how to interpret the visions and the knowing. Few Mediums are what could be considered totally natural. Most of us need some sort of training and there are institutions that specialize in training Mediums. The training consists of helping the medium to understand and interpret what she is seeing and feeling.