Place it at the moment of access in a sequence, after a failed attempt using the Classic Error Sound Button and before a reveal sting. Follow it with the Dun Dun Dun Sound Button when the opened door leads somewhere worse, not better.
關於此聲音
This is a short electronic scanner effect from Poppy Playtime, the beep and confirmation tone that plays when a GrabPack hand is accepted by a hand scanner. It lasts just under three seconds and feels tense then satisfying, like a locked door in a creepy toy factory finally giving you access.