Late-Monday, Arbitron, said it was delaying the expansion of its new electronic radio ratings system, the Portable People Meter.

FORBES: Magazine Article

The Portable People Meter is an electronic device that measures nearby radio signals.

FORBES: Magazine Article

Late-Monday, Arbitron (nyse: ARB - news - people ), said it was delaying the expansion of its new electronic radio ratings system, the Portable People Meter.

FORBES: Arbitron Goes Off Meter

The company has spent several years developing a "portable people meter"--a cell-phone-sized device that panelists could carry with them and automatically record not only radio signals but television sound and even such other acoustic sources as music piped in at a grocery store.

FORBES: A Seismic Shift In Rating Radio