Meaning of onomatopoeia バン / ババン / バーン


Whilst reading Japanese manga, to assist me in learning, I frequently come
across a few actions that I am completely unfamiliar with. (Section is circled
in red):

![depicts scenario](https://i.stack.imgur.com/Z3A1V.gif)

It even appears in fan art (this time differently):

![depicts scenario again, slightly
differently](https://i.stack.imgur.com/OCFeT.jpg)

Now I know that normally onomatopoeia like "SLASH" and "BANG" are depicted
here, so maybe this is similar? Can someone tell me what this is?




バン！/ ババン！/バーン！ is like "Ta-da! / Ta-dah!"




バン！/ ババン！/バーン！ is like "Ta-da! / Ta-dah!"

