Place it just before a reveal in a forest or night scene, then follow it with a Dun Dun Dun sting for the next beat, and save a second howl for the moment the danger returns.
關於此聲音
This is a close wolf howl lasting about seven seconds, with one long, rising call that sounds as if the animal is just beyond the trees. It feels tense and lonely, like a quiet night suddenly turning wild, and it puts a listener on edge without any music or voices. The nearness makes it more unsettling than a distant howl.