Cochlear Implants are prosthetic replacements for the inner ear and are only appropriate for people who receive minimal or no benefit from conventional hearing aids. Part of the devise is surgically implanted in the skull behind the ear and tiny wires are inserted into the cochlear. The other part of the devise is external and has a microphone, a speech processor and connecting cables. This book is a textbook that covers the scientific principles behind the device, the technology, how to assess candidates, how to implant the devices and what rehabilitation makes the most sense. The editor is the best known person in this field. One reviewer said "there is not smarter man in the world than Niparko."