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The RADAR reports indicate that starting from the RADAR 95 report in December 2007, audience estimates for radio were based on a mix of PPM (Portable People Meter) and diary respondents. This combined method continued until 2011, when a consistent measurement mix was established. The data illustrates the steady weekly reach of radio among persons aged 12 and older, measured from Monday to Sunday, 6 AM to midnight. Insights from RADAR reports (75 - 115) showcase the radio's enduring presence and consistent audience engagement.
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Radio’s Weekly Reach Remains Consistent ## Indicateds that beginning with the RADAR 95 December 2007 report, the audience estimates produced may be based on varying combinations of PPM and Diary respondents until 2011 when measurement mix became consistent Source: RADAR 75 Fall 2002 - RADAR 115, December 2012; Radio Usage; All Radio; Persons 12+; Monday-Sunday 6am-12midnight; Weekly Cume Persons and Rating.