CD for the Deaf???

We were having dinner and we talked about Bible. Vanessa asked if there is difference in the Christian and Catholic Bible? Me and Amela were unable to answer the question. Then she asked if there is Bible in CD form? I replied fast and loud, 'Of cause! There is CD for the deaf.' After hearing my reply, Both of them have a very puzzled look. For a moment, I thought 'how come my friends so stupid.' Then Vanessa said, 'isn't CD should be for the Blind? Deaf can't hear what?' .......=_=