Big fan.
As far as emotional response. Audio of reading a newspaper, no talking. Just the pages turning as they should. I think it reminds me being at my grandparents and I would nod off and grandpa would read the paper. Kind of like Ratatouille.
As far as relaxing there can be no talking or whispers, creeps me out. Ambient weather, or weird stuff like someone applying spackle or sweeping. There is a something chill about the rhythms and the sounds. Knocks me out at night.
Bob Ross is the one I can stand talking. His relaxed tone and the painting and scraping sounds. This stuff settles me in for the night.