Bangs

So, one thing that has always puzzled me, and so I look you you guys out on the internet, is..

Why do Americans call their fringe .. Bangs..

Most things that have different names over there have some understandable reason, freeway, I guess its not a toll road, so, its free! Sidewalk, well you walk on it st the side of a road....

But, I just can't understand bangs..

Here, the word bangs has a simple meaning, sudden noise or impact.

So, I don't get how a fringe, gets named.. Bangs..