Attendees Tune In with FM Radio Transmission

Audience response keypads aren't a new idea: Attendees are each given a small keypad with which to answer questions. They can pick yes or no, or punch in a number that correlates to choices of answers, usually projected on a screen. The audience's choices are tabulated by an on-site computer, then graphically displayed on the screen as bar graphs or pie charts. It takes about three seconds once polling is over to get the results on the screen.