Depending on the type and severity of your hearing impairment, treatment plans and processes with differ slightly. Understanding the possible types of hearing loss as well as their causes can help you to better understand your own hearing impairment. In general, there are three main types of hearing loss: sensorineural, conductive, and mixed. There are also four agreed upon levels of hearing loss severity: mild, moderate, severe and profound. All four degrees of severity can be found in most types of hearing loss.