True story. Several years ago I walked in the back door or our office building. Take a few steps down and you were in the basement area where they had built a work out room.
As I stood on the landing, I heard what I thought was a holy roller charismatic preacher doing a sermon. I could hear the cadence of the voice, but I couldn't make out the words of the voice of who was saying them. I walked do to where the work out area was and saw through the window our sales manager jogging on the jogging machine.
I opened the door to ask what in the world he was listening to. As the door opened, I could then make out the words and clearly hear the voice.
He was listening to Rush on the radio.
It is a very common characteristic.
Obama has it in a way lilting hypnotizing way.
There is a term for that cadence, but I do not recall it.