A study of when and how Americans tune into public radio turns up some curious patterns
See the bump in the blue line on the chart at right? That represents the more than 8,000 Americans who listen to National Public Radio on their iPhones (rather than, say, their car radios) between 8 a.m. and 10 a.m. on a typical weekday morning -- one of the more surprising results of an hour-by-hour study of listener habits released by NPR Wednesday.
"This is a unique pattern among NPR mobile platforms," writes NPR data analyst Meredith Heard about the iPhone listeners, "and may indicate a strong use of that particular app during the morning commute."
Heard speculates that some iPhone owners are streaming the station through their car stereo, something the latest research from Infinite Dial indicates 6% of U.S. cell phone owners do.
Although NPR is also available on Apple's (AAPL) iPad, Google (GOOG) Android devices, and NPR's mobile website, those platforms see more steady use until early evening. That's when, as Heard puts it, "the mobile site and iPad app experience a bit of a second wind of traffic, perhaps as people get their last dose of news before bed."
An earlier version of this story suggested that more people listen to NPR through the Web than on the radio. This is not true -- far from it, as NPR publicist Emerson Brown made clear in a follow-up note:
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