Put it at the reveal in a gameplay edit, just before the action starts, then follow it with Enemy Spotted to confirm the threat and Bomb Has Been Planted when the objective changes.
關於此聲音
This two-second clip is the short spoken game warning 'hostile found', delivered as a direct announcement that an enemy has been located. It gives a sudden tense, alert feeling, turning a calm moment into one where danger feels close and every move suddenly matters.