Neighbor causing disturbance

So we have this neighbor where a couple lives together. I think they also have children. They tend to fight and we can hear the shouting and punching loud and clear every single day. We don't really wanna get in their business but it is causing disturbance in the neighborhood especially when you're just trying to get a nice sleep at 12 am. I have a feeling they won't leave unless one of them leaves. We just want a peaceful life and neighborhood... come on man :DD