How can we “hear” auditory hallucinations?

Question

What causes auditory hallucinations in the brain? For example, when you are sleep deprived, it is possible to hear things very clearly as if they were real. For example, voices of people talking, which some people with schizophrenia experience commonly in their daily lives. But of course there is no input from the ears. So what exactly is happening and how is that possible?

In: 677

Answer 1

I often “hear” a super loud bang. Like an explosion.
Only while I’m about to fall asleep though.