[WindowsCentral.com]

Berlin, Germany Invoking Cortana on Windows Phone is a straightforward affair with a single button press of the Search key (or swipe-down on the HTC One for Windows with Dot View case). However, newer technology found on the Xbox Kinect and some other Android devices is making the jump to Windows Phone: passive voice activation.

Arriving later this fall with the newly announced 'Lumia Denim' firmware update, some Lumias are getting the hands-free feature named 'Hey Cortana.' Users with smartphones featuring the Snapdragon 80x chipsets, like the Lumia 930, Lumia Icon, and Lumia 1520 can all take advantage of the Cortana extension.

Full story from the WPCentral blog...