This is essentially a bass guitar with distortion with three layers of notes, merged together to make a "siren" of sorts. It can be used as a fire alarm, or maybe an alarm on a spaceship or UFO.
緊急報警
聲道：2
類型：mp3
Warning、Alert、System、Alarm、Fire、Emergency、Siren
警告、警報、系統、報警、火、急、siren
資料來源：freesound ( https://freesound.org )