I sometimes have auditory hallucinations and they are not voices but noises more often, or a single words shouted or whispered. I don't have them very often and I usually have them in cluster with visual hallucinations. I usually see people.

So for example I might see a person who isn't there, then a day or two later hear something, then see something again. Then I won't experience it again. Sometimes the clusters come close together or far apart.

My most common auditory hallucination is very loud footsteps of someone walking behind me.