Place this clip at the start of a scene as the warning layer, then follow it with FBI Open Up Explosion for the impact moment. End the sequence with a short reaction sound to release the tension you built.
关于此声音
This clip is a 13-second emergency siren that rises and falls in a slow wailing cycle, harsh and metallic throughout. It creates immediate tension and unease, making listeners feel like danger is close and something serious is about to happen. It is a generic civil defence warning tone, the type long used for air raid and disaster alerts.