I am deaf in my left ear (due to mumps in childhood) now can't hear tv and need subtitles but also can hear ringing in my right ear. what should i do?

Audiogram: You need to know how much hearing you have in the good ear. If the right ear has a hearing loss less than 40%, you may be a candidate for a bone anchored hearing aid, so-called baha in the left ear. The idea is that when sound comes from the left side, the sound energy will within milliseconds be transferred to the more normal right ear. This will result in the perception of sound in the l ear.