On page 90 of Chapter 5, we talk about the problems of sounds not being. readily identifiable when they don't have an iconic character, for example a toilet flush or a horse whinny. Researchers in this article look deeper into the connection between how the auditory and visual cortices interact with each other, often leading to conflicting interpretations of the sound that can both be harmful and useful to a sound design, a phenomenon known as the McGurk Effect.