The National Institute on Deafness and Other Communication Disorders (NIDCD) in the United States reports that researchers have proposed a new theory; that tinnitus may be the result of a breakdown between the brain’s limbric system and the auditory cortex. Read their report “Tinnitus: Is This What Happens When the Brain’s Gatekeeper Breaks Down?” The NIDCD report at https://www.nidcd.nih.gov/search?search=tinnitus includes additional links.