This document provides an overview of phonetics and phonology. It defines phonetics as the scientific study of human speech sounds, and notes it has three branches: articulatory, auditory, and acoustic phonetics. Phonology is presented as the study of how sounds are organized in a particular language. Key concepts covered include the International Phonetic Alphabet (IPA), English speech organs and their functions, manner and place of articulation for English consonants and vowels, and phonetic transcription.