I am deaf in one ear, and I also know many other people who are either deaf or nearly deaf in one ear. For decades I have been frustrated at listening to music through headphones (and now earbuds) and only being able to hear part of the music. Reformatting music into mono doesn't help because the sound quality goes way down. I think it is simple and easy for someone to develop a single earbud and connects both stereo streams of music into the single bud. This would allow all those, like me, who are deaf or nearly deaf in one ear to hear all of the music we love.
Discussion
Related Ideas