Paragon Media's Larry Johnson blogged this week about Internet streams of broadcast radio stations increasingly appearing in Arbitron PPM ratings.
To be listed in the PPM ratings report, a "station or combo must have received at least one quarter-hour of listening credit from at least one In-Tab panelist and a Metro Cume rating of 0.495 or greater."
It's that second part, the cume rating, that's the greatest challenge for Internet streams being listed, he says. Paragon did an analysis of October ratings in four PPM markets, and found 18 station streams with enough listening to register in PPM. "However, only 22% of those listed stations posted 6+ Shares in October 2011 (Persons 6+ Monday-Sunday 6a-Midnight)." Obviously, any stream that made it in the listing had some listening. But the measurements are subject to rounding error, and those small audiences rounded down to zero.
"It would be great if all Internet, time-shifted archives/podcasts, mobile, and satellite radio were coded and accessible in the local market reports so we could get a comprehensive view of the audio listening landscape," Johnson wrote. "Now that the listing hurdle has been cleared, look for your station’s Internet stream to be an even more important part of your ratings profile."
Read the Paragon Media blog here.