I think this is what happened to Rush Limbaugh a number of years ago. He suddenly lost his hearing. I think he ended up having cochlear implants done. Not sure if it was one or both ears. Sudden Hearing Loss is an interesting “read” on the Merck Manual Professional Version website...well, it is for ME...I like to read about “medical” stuff. This website can be quite informative - they even have a veterinarian version for us animal lovers I find very useful.