Boom said:
But when it sounds painfully forced, it loses it's "tough" factor and just sounds ridiculous.
It didn't sound forced, though. I'm not even sure what that means. I've heard it a billion times since I joined this board and I can never read it without snorting. "Forced." It's a buzzword like "wooden" acting and "bad editing" and stuff like that. People say these words but they don't even know what they mean, if they mean anything.
If Bale's Batman voice has a fault, it's that it sometimes sounds uneven. Most noticeably, on the train when the tracks are collapsing he says to Ra's, "you never learned to mind your surroundings," the voice goes oddly high in pitch.
But I'm 100% certain that was a creative decision, i.e., it was part of Bale's performance. You know how I know that? Because if it wasn't a creative decision, it wouldn't have been in the movie. No line of dialogue gets into a movie sounding any way other than the way it is intended to sound. There's a wonderful thing called "ADR." If the dialogue recorded during shooting is unclear, or in any way unsatisfactory, they just re-record it.
So that uneven quality in Batman's voice was intentional. I think, given the fact that Batman and Ra's were locked in a wrestling hold of sorts, the voice was supposed to sound as if Batman was straining. 'Cuz he was. 'Cuz Ra's is his equal in combat.
During the Flass interrogation, on the other hand, Batman sounds flat-out evil. When he's talking with Gordon, he just sounds like Batman. When he's in a tight spot, sometimes the voice breaks, as it did on the train.