Apple working on voice-recognizing headphones with built-in accelerometer, beamforming mics | Internet of Things & Wearable Technology Insights | Scoop.it
From appleinsider.com - April 4, 2014 1:39 AM

Apple is looking to advance the design of its bundled iPhone EarPods by potentially implanting an accelerometer into the earbud portion that could recognize voice activity, which in turn would activate and tune beamforming microphone arrays....