The World Health Organization has estimated that approximately 278 million people internationally suffer from moderate to profound hearing loss in both ears. Diagnostic medical records from the World Health Organization suggest that the incidence of hearing loss increases frequently due to the age of the population and improving life expectancy rates. Additionally, according to healthyhearing 2012, most types of hearing loss experienced by people are sensorineural hearing losses; the hair cells in the inner ear or the nerve pathways from the inner ear to the brain are severely damaged. However, ranges of technologies such as hearing aids continue to expand and assist victims of hearing loss; the technology that scientists had produced and offered to the public in the past could only amplify sound. The development of the cochlear implant has expanded significantly since an Australian otolaryngologist, Professor Graeme Clark, and his team of three Melbourne healthcare professionals: Professor Richard Dowell, audiologist, Dr Robert Webb and Dr Brian Pyman , surgeons, had successfully found a solution to effectively restore hearing to develop the first multi-channel hearing prosthesis and demonstrate its proposition; performed the first implantable prosthetic "bionic ear" surgery on a human patient with assistance from a medical technology organization, Nucleus in 1974. The success has allowed doctors to commercially perform cochlear implants in patients from 1982 to the present in Australia and other countries around the world. International researchers applied an implanted device that had wires internally and externally leading to an individual's head. Clark hypothesized theoretically that the implanted device offers more opportunities… middle of the paper… in this example. According to the Cochlear Implant Cooperative Research Center, the use of two microphones allows users to advance the perception of speech in the environment, auditory nerve regeneration is necessary to increase productivity, decrease surgical risks and fully develop a cochlear implant that resides completely under the skin in order to decrease the difficulty of using the cochlear. Ultimately, it is clear that Professor Graeme Clark had fundamentally changed the world for people with moderate to profound hearing loss, despite the amount of risk. With all its limitations, the cochlear implant is called a premature technology that scientists are often improving. With the gradual contribution of technology, what will be the future development of cochlear implant and how can their theoretical research become reality?