Pandora has announced ratings from the September 2012 Triton Webcast Metrics report, showing that the popular digital music service's AQH and cume numbers continue to grow.

The September 2012 Triton Webcast Metrics national ratings show that among adults 18-49 demographic, Pandora has a weekly cume of 26,855,438. This represents a six percent increase from June, when weekly cume was 25,333,249 and Pandora claimed it ranked as the largest adult 18-49 radio network in the U.S. when compared to radio networks in the Arbitron June 2012 RADAR 113 report.

In the top local radio markets, Pandora saw cume growth in the adult 18-34, 18-49 and 25-54 demographics in the September Triton metrics, meaning that the number of different (unduplicated) individuals tuning to Pandora from Monday-Sunday, 6:00 a.m. to midnight in an average week continues to grow.

In the 18-34 demographic, the September metrics showed that Pandora averaged a 1.2 AQH rating in the top U.S. radio markets, including New York and Los Angeles. The September 2012 Triton Webcast Metrics local report can be found here.

Pandora Chief Revenue Officer John Trimble said, "Triton's metrics have been instrumental in helping the radio advertising community finally understand the tremendous scale of Pandora. Pandora is now the largest radio station in most major markets across the U.S., across every demographic. And as our audience has grown, we have developed a unique portfolio of advertising products - graphic, audio and video - that truly leverages the platform."

The September 2012 Triton Webcast Metrics are based on listener data from August 16, 2012 through September 12, 2012 for key radio buying demos, including adults 18-34, 18-49 and 25-54, Monday-Sunday 6:00 a.m. - midnight.