The invention of hearing implants is a great benediction to people having impaired hearing. In this field, the FDA approved numerous institutional research and implants, allowing hearingimpaired individuals to live normal lives. In this paper, the thorough work done in many domains of hearing implants throughout a decade ending in 2021 is described in relation to cochlear implant users and people with normal hearing. There were many inventions that are closely related to different kinds of problems that pertain to variations in hearing capabilities. Some of them are based on the mixed type of hearing loss. Some of them are related to the underperformance of the various parts of the ear (i.e. outer, middle, inner). It mainly deals with, the length and strength of operations of those parts of the ear. According to each type of problem, different kinds of implants have been designed. The main issue is related to assessing the kind of medical test that can be performed after such kinds of implantation. The details related to these topics are presented in this paper in the form of facts and figures with respect to cochlear implant users.