Since reading this story (I had nearly the same set of scans ready to go), I've loved imagining Wonder Girl using her amazing powers of mimicry at Teen Titans parties.
******** "Oh, no, Aquaman! We're trapped!" "Hahahahahaha!!" "Hey, I don't sound like that, do I?" "You do, Garth! You totally do!" "All right, let's see how you like it, bow-boy! Donna, do Roy." "Hey, doll-face, I'm all a-quiver over you." "HAHAHAHAHAHA!!!" "Okay, see, that's different. That's not funny. Everyone stop laughing. I mean it." *********
And the most wonderful thing about that detail of the story is that it leads...nowhere. The fact that the bad guy is somehow imitating or recording Gordon's voice—completely immaterial to solving the mystery.