Ultrasound gel does amazing things to sound waves

I was curious about the purpose of ultrasound gel. It's really interesting so I built this wave machine to explain how it affects sound. Video produced in cooperation with Merck (https://www.youtube.com/user/merckgroup). Merck is known as Merck KGaA, Darmstadt, Germany in the United States. Here's the link to Ode To The Future: https://curiosity.merckgroup.com/ode-to-the-future/?KO=StMo Animations by Dom Burgess. His brilliant channel, Every Think, is here: https://www.youtube.com/channel/UCGI000V6ZIAQf97MNybAaLQ CORRECTION: when I calculate the efficiency of the ultrasound scanner without gel I come to a figure 1/10000%. But that would only be if there was a full on air gap. When pressed against the skin the situation is much less dire. The gel ensures a better acoustic coupling by preventing air gaps etc. Thanks to a couple of comments for pointing that out. Thanks to these amazing patrons on Patreon for supporting my channel: Glenn Watson Joël van der Loo Website: https://stevemould.com Patreon: https://www.patreon.com/stevemould Twitter: http://twitter.com/moulds Instagram: https://www.instagram.com/stevemouldscience/ Facebook: https://www.facebook.com/stevemouldscience/ Buy nerdy maths things: http://mathsgear.co.uk