The sump I just finished building is significantly louder than I expected. I notice that the line coming from the overflow is not completely full. I'm thinking it needs more restriction maybe? I was thinking if I re-do the hard plumbed part so the flexible line goes into a downward facing elbow. This would make the water have to travel vertically a little bit before emptying into the trickle tower. I think that it might help but I'm not sure if my thinking is correct. Here's a video.
