I have suffered a lot from this for 25 years. I wonder if they will figure anything out while I am still alive (probably not). Too much loud machinery back in the day.
I told my wife, at least when I die the never ending screeching will stop. Silver lining and all that.
There are some people who have it so bad they have an operation to sever the auditory nerve or remove the cochlea in order to get peace and quiet..................