The Backrooms began as an internet creepypasta in 2019, built around a photo of empty yellow office rooms and the idea of slipping out of reality into endless liminal floors. The concept spread through forums, YouTube series and indie games, with its buzzing lights and empty corridors becoming shorthand for uncanny, in-between places. This sound draws on that atmosphere, so creators reuse the hum whenever a scene needs to feel abandoned and unreal. It remains popular because a few seconds instantly signals the Backrooms without any explanation or dialogue.