Pandora now streams over one billion listener hours per month, up 88% from 567 million listener hours a year earlier, while its number of active listeners grew to 51 million from 32 million. Pandora defines active listeners as any listener who initiated an audio stream in the most recent 30-day period.

With the multitude of streaming radio options available to listeners, a new study has found that certain demographics prefer one service over another.

New files possibly pointing to a forthcoming, Apple streaming radio service – or at least new functionality – have been discovered in the iPad’s file system. The files include a button icon with a picture that resembles a radio tower, similar to one which used to be found in iTunes.