The clip is credited to Taira Komori, a Japanese sound effect creator whose free library sounds are widely reused in indie games, videos and soundboards. The file name lists it as number 19 and describes it in Japanese as a low alarm, which explains its restrained, low-level warning tone. Online it became associated with SCP fan projects, where alarms mark containment areas, security levels and facility incidents. That connection keeps it in use for sci-fi horror scenes that need a believable system alert without a movie siren.
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A low-pitched alarm warning sound lasting a few seconds, used in SCP games and horror edits to signal danger, a breach or a low-level alert moment.
This is a short, low alarm tone that repeats with a steady, urgent pulse rather than a loud siren blast. The pitch stays deep and flat, creating a sense of a system warning in a locked-down facility or control room. It lasts only a few seconds, so it feels like an alert level being announced, not a full emergency. Listeners instantly read it as something has gone wrong but help has not arrived yet, which makes it tense without being jumpy or overwhelming to hear repeatedly in a scene or edit.