Why do some higher frequencies sound like they have lower pitch than lower frequency sounds? Engineer and music lover Shaun Fitzgerald explores the phenomenon of the missing fundamental. Subscribe for regular science videos: http://bit.ly/RiSubscRibe Shaun Fitzgerald is a Royal Academy of Engineering Visiting Professor at the Department of Engineering at Cambridge University. Dr Fitzgerald was previously also the CEO of Breathing Buildings Ltd, a leading technology company pioneering hybrid ventilation systems. He was appointed a Fellow of the Royal Academy of Engineering in 2014. --- A very special thank you to our Patreon supporters who help make these videos happen, especially: Andrew McGhee, Anna-Chiara Bellini, Dave Ostler, David Crowner, David Lindo, David Schick, Erik Shepherd, Greg Nagel, Jan Bannister, Joe Godenzi, John C. Vesey, Kellas Lowery, Lasse T. Stendan, Lester Su, Matt Townsend, Osian Gwyn Williams, Paul Brown, Radu Tizu, Rebecca Pan, Robert Hillier, Robert Reinecke and Roger Baker. --- The Ri is on Patreon: https://www.patreon.com/TheRoyalInstitution and Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter Product links on this page may be affiliate links which means it won't cost you any extra but we may earn a small commission if you decide to purchase through the link.