Documentaries are known very well for this form of sounds. Voices that are pleasing to the ear explain the wonders of the universe. Narration is most beloved when created by well known, soothing actor’s voices.
Narration has also evolved into something else, using the soothing sounds of narration and putting people at ease with just the sound alone. This is more popularly known as ASMR. Something to put everyone asleep when they need it.