Remember back before 'The Dark Knight Rises' came out and there was all that controversy about no one being able to understand what the hell Bane was saying? Christopher Nolan was very against modifying his voice, but seems he was pressured into making him more clear and easier to understand. In my opinion, it almost seemed like Nolan was kinda messing with the studio for making him do it, cause at times he was almost TOO clear. If you've seen the movie, then you may have picked up on it that he kinda sounded amplified every time he spoke. Here's a side by side before and after of Bane's voice from the opening scene in 'The Dark Knight Rises'.