Closed captions are on-screen text of speech and sound for the deaf. Turn on closed captions.
They describe the noises as well as the words, which subtitles do not. Closed captions are now used by a great many hearing people, especially in noisy places.
1nounclosed captionsOn-screen text of speech and sound for the deaf.
“My grandfather turns on the closed captions because he's losing his hearing.”
closed captions is text.
Also accepted in games: captions
closed caption "closed" originally indicated that such captions were by default not visible until activated (opened) by the viewer turning them on, in contrast to open captions which are embedded in the video itself, visible to all.
Etymology from Wiktionary, CC BY-SA
Practised in Disability & Access