 Okay, so now what we're going to do is we're going to demonstrate the steps of hearing when people think about hearing They think oh, they're sound and then I know what that is But they don't realize that you have to take sound waves Transform them into mechanical vibrations then turn them into fluid waves where you can finally get action potentials So we're going to do is we're going to act out all of those stages so that you can see how action potentials are produced from simple sound waves Okay, where we're going to start Is right here at the very end with sound waves sound waves are going to be funneled or continue are caught by the Oracle funneled into this external auditory canal and then hit the tympanic membrane Okay, at that point the tympanic membrane is going to hit the Malleus Which will bump into the Incas Which bumps into the stapes? Now that we've vibrated the stapes. We're going to cause these fluid waves to form in your scale of vestibule The scale of vestibule the waves are going to go all the way to the top of the cochlea Come back down the scale of tympani and as they do you can see that organ of Corti just floating on top of the water and That organ of Corti the waves are going to lift it up and those cells are going to bend Against a tectoral membrane, which is going to be right here right above the organ and when those cells bend You create your action potentials which are going to travel up to the brain and you're going to be able to understand what you just heard