Does this sound illusion fool you?

Audio illusions show us that hearing is about more than just sensing frequency. Which ones trick you every time? Head to to start your free 30-day trial and get 20% off an annual premium subscription. If you’re looking for a molecular modeling kit, try Snatoms, a kit I invented where the atoms snap together magnetically. ▀▀▀ A big thank you to Titus Grenyer over at Pep Organ for showing us around the Sydney Town Hall Organ, to Dr. Diana Deutsch for providing her illusions and insight into the field, to Casey Connor for advice on building sound illusions, and to Dr. Michael Bach for providing the motion-bounce illusion. Pep organ: Casey Connor’s Psychoacoustics: ▀▀▀ References: Images & Video: Aircraft Detection before radar, 1917-1940 - Women’s Auxiliary Air Force operator Denise Miley - Daventry Experiment Van, operated by “Jock” Herd - Perfect fifth - Denge acoustic mirrors - The original uploader was Jksolomon at English Wikipedia. - Denge sound mirrors | Sound Mirrors Mayer telescope in 1880, US patent number 224199. NAE Website - Acoustic Source Localization Techniques and Their Applications Professor Mayer’s Topophone - AR_Speaker_v12 - Download Free 3D model by steveMarketscale [6ca6a0a] - Sketchfab Ear Phenotypes ▀▀▀ Special thanks to our Patreon supporters: Adam Foreman, Anton Ragin, Balkrishna Heroor, Bertrand Serlet, Bill Linder, Blake Byers, Bruce, Burt Humburg, Dave Kircher, David Johnston, Evgeny Skvortsov, Garrett Mueller, Gnare, gpoly, I. H., John H. Austin, Jr., john kiehl, Josh Hibschman, Juan Benet, KeyWestr, Kyi, Lee Redden, Marinus Kuivenhoven, Matthias Wrobel, Meekay, meg noah, Michael Krugman, Orlando Bassotto, Paul Peijzel, Richard Sundvall, TTST, Tj Steyn, Ubiquity Ventures, wolfee ▀▀▀ Directed by Sulli Yost and Derek Muller Hosted by Derek Muller Written by Sulli Yost and Derek Muller Edited by Jack Saxon and Peter Nelson Animated by Fabio Albertelli, David Szakaly, and Ivy Tello Illustrations by Jakub Misiek Filmed by Derek Muller Produced by Sulli Yost, Derek Muller, Rob Beasley Spence, Emily Lazard, Tori Brittain, Emily Zhang, Petr Lebedev, Gregor Čavlović, and Gabe Bean Thumbnail contributions by Peter Sheppard and Ren Hurley Additional video/photos supplied by Getty Images, Storyblocks, and Envato Music from GarageBand, Virtual Piano, and Epidemic Sound