These sounds keep the feeling going, while making sure the listener doesn’t have too much to process. More times than not, in communication it’s the feeling that matters anyway. Only 7% of communication is the words we choose.
This presents an opportunity. If you’re making a presentation and showing slides, perhaps you don’t have to explain them all, create a set of rapidly advancing slides that make the point you’ve been leading to without having to explain. This is the presentation equivalent of the repetitive sounds in song. It’s also a bit unusual, so it will create some tension, which is good for a presentation.