The Backstory to Great Audio Storytelling, hosted by Rob Rosenthal, for Transom and PRX.
https://transom.org/topics/sound-school/
All The Sound We Can Not Hear
Jeff Emtmen pulled an audio sleight of hand in an episode of Hear Be Monsters about Mexican free-tail bats. It's a delight to listen to. To understand Jeff's trick, Rob offers a primer on sound and hearing.