 Welcome to this unit which discusses the role of the larynx in speech. We will see how the larynx controls and modifies the pulmonic airstream, how it produces additional types of airstream and, depending on the state of the glottis, how it generates voicing. In the virtual session with its question sheet as default guidance, we will look at the structure of the larynx. We will discuss the physical sources of phonation and we will exemplify several types of phonation. The mastery worksheet is a dynamic multiple choice test with ten questions about phonation. It shouldn't be difficult after the virtual session. And the practical? Well, it simply looks at phonation from different angles, from physiology to production. After this unit, you should not only understand the principles of phonation, but you should also be capable of producing all possible types.