The document recaps vowels and consonants in English phonology. It states that vowels form the central sound of a syllable while consonants form the outer shell. It then discusses the three phonetic features of consonants: manner of articulation, place of articulation, and voicing. It provides examples of different manners of articulation like plosives, fricatives, and approximants. It also lists the different places of articulation in the mouth and gives examples of the six English plosive consonants differentiated by their place and voicing in the phonetic chart.