Hearing loss is a disorder of the auditory that manifests itself as a decrease in the ability to perceive sounds. It can be caused by a number of factors, including the natural aging, exposure to excessive noise, ear infections, disorders of the inner ear, or genetics. The hearing loss can be of varying severity and it can affect one or both ears. Depending on the severity of the hearing loss, the person may have difficulty to feel the weaker soundsto understand the wordsor interact with others in noisy environments. The hearing loss can be evaluated by a medical specialist or an audiologist, and can be treated with the use of hearing aids, cochlear implants, rehabilitation therapy, or other interventions, depending on the underlying cause.