The goal of all Cochlear Implantis to enable someone to hear. So how well does it work? How good the processing is?andHow many channels of information can be effectively passed through cochlea implant?certainly these questions require very pertinent answers. So firstly, Functioning of Cochlear Implant is completely dependent upon its ability to stimulate auditory nerve at several locations. As a general rule, more number of channels makes sound informationmore recognizable. More channels are better but the bleed over electrical stimulation limits the maximum number of channels that can reasonably be used. Currently FDA approved devices and the state of the art processors typically employ between 12 and 22 stimulating channels of information.
However to get a sense of the intelligibility of the signal send by channels of cochlear implants, you should check out the audio samples below.

Original speech

speech with 1 channel

Original speech

speech with 2 channel

Original speech

speech with 4 channel

Original speech

speech with 6 channel

Original speech

speech with 8 channel