Less than a year ago, Apple released the iPad Mini following months of speculation from bloggers and Apple fans regarding the specs of the device. One of the rumors suggested the iPad Mini would have a second microphone located on the rear shell, placed at the top middle.
The current generations of the iPhone and iPad all feature a secondary microphone for the purpose of improving the audio pick-up for videos and communicating with Siri. Yet, when the iPad Mini was released, there was no sign of this second microphone. Photos have surfaced of the prototype of the first generation iPad Mini, and looking at it you can clearly see the hole in the shell that was meant for the placement of the microphone.