Canned laughter, or a laugh track, became standard in American television sitcoms in the 1950s and 1960s to mimic a live studio audience. The technique was popularized by sound engineer Charley Douglass and his laugh box. Multi-camera sitcoms later recorded real audiences, but the short isolated laugh clip spread online as a meme sound. Editors now use it ironically, dropping it after unfunny or cringe moments to recreate the feeling of an old broadcast comedy.