How to change your voice like in the movie trailer?

like in some movie trailer or tv commercials, the narrator always has a deep voice... like in this vid:

http://www.youtube.com/watch?v=9W1dhqc-JBs

Is there a way or a program which i can make my voice deeper, similar to the one in the video?



thx in advanceHow to change your voice like in the movie trailer?
maybe this website probably can help you.i hope so.:)

graphics animation

witness in a civil case