A brief history of how the laugh track shook up TV's best shows
The Laff Box - 99% Invisible
Charles Douglass' Laff Box | Warehouse 13 Artifact Database Wiki | Fandom
The Laff Box: The Mysterious Source of Sitcom Canned Laughter - History of Yesterday
1953 Charlie Douglass "Laff Box" | Antiques Roadshow | PBS
MATRIXSYNTH: The 1953 Charlie Douglass "Laff Box"
Stuff You Should Know on Instagram: “Laugh tracks have been around since the early 1950s and it's all thanks to one (reviled) sound engineer who put them in a 'Laff Box'. But…”