Sonnette is the French word for a doorbell, and this clip is used online as a simple, instantly understood door sound rather than as a quote from a film, show or song. Because a doorbell needs no explanation, creators reach for it whenever a scene needs an arrival, an interruption or a punchline, much like a door knocking sound used to announce someone outside. Its short length and clean ending make it easy to drop into memes, vlogs and short-form videos, where it has stayed useful precisely because the everyday sound never goes out of date.