Next - closed caption RADIO ?

Even though I am not hard of hearing, I find  CLOSED CAPTION

    TV very useful.  Even viewing videos, I am annoyed by garbled conversation.

     Often  the caption can CLARIFY the dialogue. How pleasant to actually

    make some sense of all that song lyric gibberish!

        I am no technical brain , but I must ask : Can't radio sets in the

    near future also have built in to them a CLOSED CAPTION  device with

    a screen ( even a print out ! ) ?

         Just think how silly a transcript of most talk shows will seem !

         In many ways radio has even more potential than TV. People can

    listen to radio while they are working. Watching TV on the job is

    almost always shilly-shallying .

           And would CLOSED CAPTION RADIO be cheap enough to be

    marketable ?