Triton Digital has released its monthly online audio Top 20 Ranker for February 2013 and Pandora and Clear Channel remain 1, 2.
The Ranker is a listing of the top-performing Internet audio
stations and networks measured by the Webcast Metrics® audience measurement
platform. Webcast Metrics® is accredited by the Media Rating Council.
Webcast Metrics® uses a proprietary platform to track
audience data and convert it to audience metrics that can be easily understood
by stations, publishers and advertisers.
Audience rankings are done on the basis of “Average Active
Sessions”, with "Session Starts" and “Average Time Spent Listening”
also displayed. Average Active Sessions
(AAS) is defined as “Total Listening Hours (TLH) divided by hours in the
reported time period.”
TLH is defined as the total number of hours that the
station/publisher has streamed during sessions with duration of at least one
minute in total within the reported time period. Session Starts (SS) is defined
as “the number of different requests for streams (i.e., stream requests) with a
duration of at least one minute in total within the reported time period.
”Average Time Spent Listening (ATSL) is defined as “the average number of hours
for each session with a duration of at least one minute in total within the
reported time period. Calculated as total time spent listening divided by
active sessions.”
Rankers are divided into “Domestic” and “All Streams.” The
“Domestic” Ranker quantifies listening done inside the U.S. based on
log-based information provided by the station, this report is not MRC
accredited. The “All Streams” Ranker merely verifies the quantity streams without qualifying where they are
being consumed, and is MRC accredited.
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