PPM meaning in Community ?

Answer:

What is Personal People Meter mean?

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. The PPM is worn like a pager, and detects hidden audio tones within a station or network's audio stream, logging each time it finds such a signal.

Although the makers of the PPM claim that it is more accurate than traditional alternatives like handwritten logs or wired meters, critics have raised issues about its accuracy. Another sales argument is that the device is immune to human forgetfulness, something that can be an issue in studies that rely on self-reporting by test subjects.

There are several parts to the PPM system:

An encoder that inserts the tones subliminally into a station's or broadcast network's airchain via psychoacoustic masking;A monitor that checks that the encoder is working properly;The wearable Portable People Meter carried by each panelist;A base station for each PPM, where each panelist in the household places it overnight to recharge the battery; andA portable recharger for vacations and other trips away from the home base.

The original PPM concept required the base station to be connected to a telephone line to transmit panelists' listening data from the PPM to the collection point. The PPM 360, introduced in 2010, uses cellular telephone technology to accomplish this without the need for a wired telephone service. They also have a motion sensor to detect when the PPM is being worn by an active person: After a period of 30 minutes of no activity, they go into a low-power "sleep" mode to conserve battery life.

reference

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