Arbitron Releases Initial Round of PPM Ratings 

The Portable People Meter continues to report higher average quarter-hour audiences on a 24-hour day.

Two Philly Streamers Join Arbitron PPM Trial 

WDEL-AM (1150) and WSTW-FM (93.7) are using separate Arbitron encoders to differentiate over-the-air audio from Internet-streamed audio.

Six More Stations Join Arbitron's PPM Trial 

WAEB-FM, WCTO-FM, WKXW-FM, WLEV-FM, WRFY-FM and WZZO-FM have joined the 38 Philadelphia-area radio stations that have already been participating in the PPM trial during 2001.

Arbitron Reaches Milestone in PPM Recruitment 

Eight TV stations, 38 radio stations and 22 cable networks in the Philadelphia market have encoded their audio signals for the U.S. market trial.

Arbitron Begins Second Phase Of PPM Market Trial 

Over the next 12 to 16 weeks, Arbitron expects to recruit a representative panel of 1,500 consumers, age 6 and older, in the Philadelphia Designated Market Area.

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