Comm?

[Another blank look at the terminology.]

I'm sorry but I do not understand...

I tried to follow the instructions and press this contraption and then people began talking through it. It is quite a miracle.

It is called a... comm? For... communication?

[He's trying to understand and he isn't stupid but he does come from a time when he knows people who think a toothbrush is a new and incredible invention and need written instructions on how to use it.]