Assertion: people meter | /r/HasProperty | ppm
Facets:
Source sentences:
text: In an effort to improve the accuracy of radio ratings, Arbitron and Nielsen Media Research are testing a "portable people meter" (PPM) for radio.
text: The Portable People Meter (PPM), also known as Nielsen Meter, is a system developed by Arbitron (now Nielsen Audio) to measure how many people are exposed or listening to individual radio stations and television stations, including cable television.