Laugh track
（重定向自Laughtracks）
![The test to see if a sitcom would survive without a laugh track was performed on the pilot episode of Hogan's Heroes.](/Images/godic/202501/23/Hogans_heroes4059.JPG")
A laugh track (or laughter track) is a separate soundtrack for a recorded comedy show containing the sound of audience laughter. In some productions, the laughter is a live audience response instead; in the U.S., where it was most used, the term usually implies artificial laughter (canned laughter or fake laughter) made to be inserted into the show. This was invented by American sound engineer Charles "Charley" Douglass.