Everyone, besides you and Donatello, had gone to watch a movie. You and Donnie stayed for two reasons. One, you watched the movie already, Two, Donnie needed help in his lab.

"-utilize a similar principle of electrical communication but with voice transmission-" He was blabbering... though you were zoned out.

You and Donnie were good friends, and you know how he could get. He kept blabbering and blabbering about science and events, etc. He was getting extra annoying and you were thinking what you should do.

"This varying current is then sent through telephone wires to the receiver-" His voice still roams in the back of your mind.

You can simply tell him to shut up, you can hit him with something, you can leave the room, you could even kiss him if you wanted to. Anything is an option, as long as he shuts up.

"Then after all that, it is converted back into sound waves, allowing the recipient to hear the transmitted voice! This would cause-"