2K Games' official Cult of Rapture website has been updated with eight sound clips that you'll probably recognize from the "Rosie" Big Daddies in BioShock.
Idle Sound - This is an example of the sound a Rosie makes while looking for a Little Sister, guiding her through the halls, or standing guard as she extracts ADAM.
Combat Example #1 | Combat Example #2 | Combat Example #3 - Rosie's make a much more intimidating noise when in the heat of battle. These are just a few of the battle cries you might hear - over a dozen were recorded.
Melee Combat - As you might imagine by now, the language of a Big Daddy is quite complex. They, of course, make different noises during hand-to-hand combat than when they are utilizing a rivet gun.
Hurt Example #1 | Hurt Example #2 - Strong as Rosies might be, they, too, can be injured. These are two of the many sounds you may hear from a Rosie when you inflict damage or, if you are lucky, before one falls in battle.
Threatening Sound - Have you ever found yourself too close to a Little Sister (whether by accident or on purpose) and heard a gutteral cry from a Rosie? That's your final warning to get away -- a threatening sound that you are in over your heard.