Sounds labelled sonnerie are shared in French-speaking soundboard collections as phone ringtones, alarms and alert cues, and this second Saint Louis entry follows that naming pattern. The 13-second loop circulates because it is longer than a single beep, giving editors time to build a small scene around a ringing device or a public announcement. Its formal chime tone separates it from harsher sirens, so creators reuse it for school, office and intercom jokes, as well as for notification overlays in short videos and message threads.