Place it right after the missed line in an edit, then follow it with a confused You What reaction when the speaker still does not understand, and close with the Law and Order Dun Dun sting for a final beat.
关于此声音
This is a short spoken line lasting about eight seconds, in which a voice insists on a word being said louder, with blunt and impatient delivery that turns a simple request to repeat something into a comic moment of frustration. It gives listeners a dry, confrontational laugh when a quiet reply needs to be heard properly. The line comes from the television series Kaamelott.