The term "speech" is used to denote the components of vocal activity such as phonation (the production of a vocal tone via the larynx or "voice box"), articulation (the movement of the structures in the mouth to create speech sounds to produce words), resonance (the overall quality of the voice as well as the process that transforms the vocal tone into what we recognize as a person's "voice") and fluency (the timing and synchronization of these components of the complex speech act). "Language" refers to the comprehension and production of language, including the mode in which it is comprehended or produced (oral, gesturing, writing, or reading).