Research using brain-imaging techniques has localized auditory hallucinations in the part of the brain called

The part of the Brain is called Broca's area.
This is a region in the frontal lobe of the dominant hemisphere, usually the left, of the hominid brain with functions linked to speech production. Language processing has been linked to Broca's area since Pierre Paul Broca reported impairments in two patients. Broca's area and Wernicke's area are connected by a large bundle of nerve fibres called the arcuate fasciculus.