I came across this little slideshow on the interwebs (as ya do) and found it extremely interesting. It is from the Scientific American Frontiers show, and demonstrates in both audio and correlating images what a person with a cochlear implant will hear.
Amazing to think that a human ear has 30,000 neurons and a cochlear implant (which uses electrical impulses to stimulate the auditory nerve) currently has 24 electrodes! (The slideshow says 22 — it is clearly not the most recent data but gives a useful representation anyway.)
Obviously, because I don’t hear, the associated audio means nothing to me — I can’t tell what the quality is like or how easily distinguishable the words are. But the accompanying images, with their varying degrees of pixellation, gave me (as a future cochlear implant recipient) an interesting and valuable insight into the relative quality of what is heard with cochlear implants.