In the same way that optical illusions can trick our eyes, auditory illusions can trick our ears. This raises a serious question: what is hearing, and how much of it is actually made up by our brains? In this story from the Unexplainable podcast, we explore how our brains create the sonic world around us, and what it takes to harness that mysterious power. Featuring psychologist Diana Deutsch, hearing researcher Matthew Winn and author Mike Chorost.  Follow the show on Twitter, Facebook, & Reddit. Subscribe to our Youtube channel here. Become a monthly contributor at 20k.org/donate. If you know what this week's mystery sound is, tell us at mystery.20k.org. Subscribe to Unexplainable wherever you get your podcasts. Visit sonarworks.com to get a free 21 day trial of SoundID Reference. Get 10% off your first month of BetterHelp online therapy at betterhelp.com/20k. Visit shopify.com/20k to get a free 14-day trial with Shopify’s entire suite of features. Episode transcript, music, and credits can be found here: https://www.20k.org/episodes/relearningbolero Learn more about your ad choices. Visit megaphone.fm/adchoices