Over the last dozen years, the U.S. Army has spent a lot of time and money figuring out how to use digital radio technology to lift the fog of war.

FORBES: Army Resets Radio Plans As Demand Signal Shifts

"It's a radio drama that we wanted to use to try and find out how much this localisation added to the experience of the listener, " Mr Churnside added.

BBC: shows off 'perceptive radio' that can alter scripts