The whistle-like alert comes from Samsung Galaxy phones, where it has long been one of the most recognisable default notification sounds. Because so many people use Samsung devices, viewers recognise it instantly without needing any visual cue. Online, creators began pulling the isolated chime out of its phone context and using it as a gag, faking incoming messages, interrupting quiet moments and poking fun at phone addiction. Its short length and clean tone make it easy to drop into edits, which keeps it popular in memes and short-form videos.