Phonology
Exactly my friend "try" wrote about this discipline in details. However,I prefer to summarize the clue of this field within linguistics so called phonology
Phonology is the study of the sound patterns of language. It is concerned with how sounds are organized in a language. Phonology examines what occurs to speech sounds when they are combined to form a word and how these speech sounds interact with each other. It endeavors to explain what these phonological processes are in terms of formal rules
.
