Deafness and hearing loss – World Health Organization

Hearing loss may be mild, moderate, severe, or profound. It can affect one ear or both ears, and leads to difficulty in hearing conversational speech or loud sounds. ‘Hard of hearing’ refers to people with hearing loss ranging from mild to severe. People who are hard of hearing usually communicate through spoken language and can benefit from …

https://www.who.int/news-room/fact-sheets/detail/deafness-and-hearing-loss