Captions do not describe important sounds
Important background sounds MUST be conveyed in the captions, preferably in [brackets] or (parentheses).
People who are deaf cannot hear the audio of multimedia (audio-video) content. In order to give people who cannot hear access to the information conveyed by the audio content, synchronized captions must be provided. The captions must include all essential dialogue, identify the speakers, and describe all essential sound effects. People who are deaf can read the captions while watching the video.
Fix this issue by ensuring that the captions include a description of all important background sounds.