Hanna Barbera was the animation studio founded in 1957 by William Hanna and Joseph Barbera, creators of series like The Flintstones, Scooby Doo, and The Jetsons. Their cartoons relied on a shared library of exaggerated vocal reactions and comic sound effects that were reused across shows for decades. Short laughs in that style became instantly familiar to generations of viewers and later circulated online as stock meme sounds. Creators still reuse this vintage chuckle because it instantly signals old cartoon humor without needing dialogue or context.