Portable People Meter

The Portable People Meter (PPM) is a device used by media companies to measure how many people are listening to or watching different radio or TV stations. It’s a small, wearable gadget that detects inaudible signals embedded in broadcasts. When a person carrying the PPM is near a radio or TV tuned to a station, the device records which station they are listening to or watching. This data helps broadcasters and advertisers understand audience size and preferences, guiding programming and advertising decisions with more accurate, real-time insights.