Thanks 23andme for sponsoring my video :) Get your own kit at https://www.23andme.com/Backyard Backyard Science Merch! https://outloudmerch.com/collections/backyard-scientist Ive always wondered what would happen if you lined up 10 megaphones in a row and yell into them, today I put that idea to the test! That literal feedback loop was crazy loud! Crash Zone - https://www.youtube.com/watch?v=_J-uKNb6TaI kuam news - https://www.youtube.com/watch?v=EAqUelpwEl8 A great resource on measuring sound