This document provides an overview of phonology, the study of sound patterns in language. It defines key phonological concepts like phonemes, phones, allophones, minimal pairs, syllables, consonant clusters, and coarticulation effects. Phonemes are abstract sound units that distinguish meaning, while phones are actual speech sounds that can vary physically. Allophones are different versions of the same phoneme. Minimal pairs illustrate phonemic contrasts. Syllables have an onset, nucleus, and optional coda. Phonotactics govern sound combinations. Coarticulation effects like assimilation and elision influence pronunciation. The document concludes that individuals' vocal tracts differ physically but languages maintain abstract sound systems.