What are the worst sounds in the world? Lots of noises that can send your hands rushing to cover your ears, but only a select can be the most horrible! Fortunately, one brave acoustic scientist named Trevor Cox decided to find out, by asking hundreds of thousands of people to rank the worst of the worst sound. It was one of the first online sound experiments - and the result was a lot of fun!

Note: This episode features sound effects, and if you’re sensitive to sounds, you may want to skip it.

Hear more about this pioneering internet psychology study on our bonus episode with Trevor Cox, available to Tumble patrons who pledge $1 or more a month! Pledge now at patreon.com/tumblepodcast

Learn more about the horrible sounds experiment on the blog on our website, sciencepodcastforkids.com.