Classifications of Deafness By Age
WHEN someone becomes deaf can be just as important a question as HOW they become deaf. There are different types of deafness classifications based on when the person becomes deaf, including:
The person is either born deaf or becomes deaf.
- Congenitally deaf is a person who is born deaf.
- Adventitiously deaf is a person who becomes deaf.
There are two classifications of deafness if the person is adventitiously deaf.
- Pre-lingual is a person who becomes deaf by the age of 3 years old.
- Post-lingual is a person who becomes deaf after the age of 3 years old.
There is an additional classification if the person is post-lingual and became deaf later in life.
- A late deafened adult is a person who becomes deaf after age 19.
As you can see, the amount of time the person was exposed to sound and spoken language before becoming deaf is factored into these categories.