I did a bit of a study of this as I was involved with a podcasting related startup at one point.
It's really varied:
- Most podcast consumption is via smartphone
- A big chunk of that is on iOS (because default Podcast app placement is inconsistent across Android flavors)
- Heaviest consumption during commutes
- Significant consumption during the workday: white collar people listening in the background - often from their desktop/web while or blue collar in place of radio and music
- You also have people doing things like playing video games and listening to podcasts regularly.