Sound represented as coming from a physical source within the story space and which we assume characters in the scene also hear. See internal diegetic sound.

Diegetic sound flows from the narrative world of a visual story. It is any sound that exists within the story and can include the voices of characters to the sounds of objects or music coming from a radio.

Diegetic sound is sound that can be heard by the characters on screen, for example footsteps or dialogue, whereas non-diegetic sound is sound that can’t be heard by the characters, like background music or narration. Within this, there are 2 types of diegetic sound; external and internal. External diegetic sound is the most common, which is where all characters can hear it, but internal diegetic sound is from the mind of a character, where only that character can hear it, not anyone else.