Put it at the very end of a talking segment, right where the sentence would continue, then follow it with a hard cut to your next scene. Pair it before a pop sfx for a lighter outro, or after a click nice to signal the topic is closed.
关于此声音
This is an extremely short electronic beep from Portal 2, lasting just a fraction of a second with no voice or music behind it. It feels abrupt and funny, like a censor cutting someone off mid-sentence, which is why it is used to end a monologue. The clip comes from the game Portal 2.