How the Batsuit Works
Unlike other superheroes who possess super powers, Batman relies on superior gadgetry to overcome Gotham Cities criminal underground. As a kid, I spent ages making all sorts of ninja stars, utility belts and various attempts at the light saver. If only I had HowStuffWorks.com (and the internet of course). The Batsuit combines armor, communications and combat technologies into one state-of-the-art crime-fighting system.
The microphones in the ears are combined with special earpieces in the cowl that give Batman superior hearing in the field. The microphones can also be used to amplify Batman's voice and broadcast it through a discreet speaker in the suit. This is what gives Batman's voice that distinctive, disembodied and unearthly sound.
How the Batsuit Works