This clip is a recording of a standard electronic fire alarm tone, the type of loud, repeating signal installed in schools and public buildings to warn people to evacuate. Sounds like this are widely shared on soundboards and meme pages because they are instantly recognisable, even without any picture, and they trigger the same alert response people learn from real fire drills. Creators keep returning to it for pranks, school comedy and emergency scenes because the tone needs no explanation and works in any language.