Many people differ on how they pronounce Amen. Some people it comes from the background that they come from. Others it depends on their personality. There is the uh-mane, ooh- mine, ah-men, and even the christian Ay-men. Now its time to dissect this concept.
The quick uh-mane: A rare trait among some people is the quick uh-mane. This is for someone who doesn't get the reason for stretching an amen out for over a minute, and they say it real quick compared to the slow uh-mane. Side affects include mistaking baruch hu with a fast uh-mane.
The Yom tov musaf uuuuh-maaaane: This type of amen is a specifically long amen with sort of tune to it.
The Ooh- (its) mine: Found mainly among the chassidish sects, the ooh-mine is simply a misconstrued form of an amen. When ever I hear an ooh-mine, I realize that when I will be in middle of shemona esray, I will be pushed around by all chassidim, young and old, who don't have any manners at all. This ooh-mine is usually said in the tone similar to that of a cry for something (ooh its mine).
The silent amen: The silent amen is even simpler than the just moving lips way of saying amen. There is no need to worry on how to pronounce it, you simply don't say it; whether it be because you were talking, or out of sheer laziness.
The loud amen: This is said by a specific sect of hassidim know as stollen. They don't just say it, they scream it all together. If you are really frum and don't know what a heavy metal concert sounds like, no need to worry this is the heimish equivalent. I just wonder how embarrassing it would be if you were screaming and said something wrong by mistake.
The Ah-men: Found among the Sephardi sect of Judaism, the ah-men is said in many weird accents ranging from, through the nose to from the throat.
The Ay-man: The Ay-man is not a call for your friend, rather yo is the term preferably used to call your friend. The Ay-man is used in the christian society, usually in a black church after every few words the priest says (E.G. "The Lord Giveth" the cong. then says "Ay-Man" loud in unison). But even the christians say it different too, the white folk say a quiet ay-men.
I can only say this; the Ay-man is a complete knock off of our amen, but who can blame them when we don't say it normally either (uh-mane, ah-men,ooh-mine).