Place it immediately after the unexplained noise in your edit, so it answers the moment instead of introducing it. Follow it with a short disbelieving reaction, then a quieter comic sound to let the joke settle before the next scene begins.
關於此聲音
This is a short French voice clip, lasting about six and a half seconds, built around one exasperated spoken line asking what those strange noises are. The delivery is blunt and bewildered, with a comic edge that makes the confusion feel bigger than the question itself. It lands as a quick, relatable reaction for anyone who has just heard something odd and cannot quite believe it.