He reaches into a pocket, pulling out a tiny object slightly smaller than a penny.

"Oh, microphones are easy. This one records and broadcasts sound a distance of two hundred yards. You'd be amazed how they've miniaturized the things. Hah, who ever though the Cold War would actually be useful to science?"

He taps the pencil against his lips.

"And you know, if they were linked to some sort of central computer, we could get constant feedback and audio analysis."