Can't communicate normally. Disabled people refer to people with long-term physical, language, hearing, mental, intellectual or various defects. Deaf-mute disabled people can't communicate normally because of physical and psychological defects or visual, auditory, language, limb, organ, intelligence and other functional obstacles. People refer to people with hearing impairment caused by congenital inheritance or acquired human factors. He is also known as the deaf, or simply the deaf.