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Chapter 4. DESCRIPTION REFLECTIONS ON EACH TOPIC This chapter is an area where you can learn the phonology of English, In the preceding chapter, we investigated the physical production of speech sounds in terms of the articulator mechanisms of the human vocal tract. That investigation was possible because of some rather amazing facts about the nature of language. When we considered the and has been very influential in both the field of phonology and in the analysis of the English language. linguistic subsystem, separate from other components of the grammar, that transforms an human vocal tract, we didn’t have to specify whether we were talking about a fairly large person, over six feet tall, weighing over 200 pounds, or about a rather small person, about five feet tall, weighing less than 100 pounds. Yet those two physically different individuals would inevitably have physically different vocal tracts. underlying phonemic sequence according to rules and produces as its output the phonetic form that is uttered by a speaker.