In May, 2010, I imagined an iPhone app I called the Blab-o-Meter. It only took a year for someone to pick up on the idea. They call it the Talk-o-Meter
“Some people don’t realize when they dominate others in a discussion. Make sure each of two participants get the same talk time with this App! After a brief calibration of both voices, the App recognizes who’s speaking and keeps track of the speaker’s talk time. The result is displayed as colored percent bars. The screen update can be set to one, two or five minute intervals.”
If you can find an earlier reference to this idea, let me know. I suspect The Coffee Zone is too noisy for the app but I’ll give it a try.