I am unfortunate enough to have lost almost all of my hearing in my latter life due to a family hereditry problem and have a cochlear unit fitted to my right ear.
Using their custom made cable I plug that into the receiver unit of the cochlear and the other end, which has a normal 7.5 mm jack into the headset plug, using an adaptor. Works fairly well for lower density traffic operations but would not be good enough for high density traffic areas. I estimate I get about 70 percent readability with this.
Do not know if the latter day hearing aids have such a facility.