This busy signal comes from the ElevenLabs sound effects library, where it is listed as a phone-call effect and credited to creator Wearmidle. It recreates the standard tone played when a dialled number is engaged, a sound most listeners recognise from landlines and mobile networks. Because the clip is short and loops cleanly, creators have picked it up for prank calls, comedy sketches, and short-form videos that need a quick audio cue for a failed connection. Its familiarity keeps it useful, even as traditional busy signals have become less common in everyday calling.