Phonetics is divided into three main branches: Articulatory Phonetics, Acoustic Phonetics, and Auditory Phonetics. Each branch focuses on different aspects of sound. Articulatory Phonetics studies how speech sounds are made by the movement of the vocal cords and other speech organs. Acoustic Phonetics examines the sound waves produced during speech. Finally, Auditory Phonetics looks at how speech sounds are perceived by the ear and brain.

The human body uses several organs to produce speech. These include the lungs, larynx, vocal cords, tongue, teeth, and lips. The lungs provide the airflow necessary for sound production. The larynx houses the vocal cords, which vibrate to create sound. The tongue, teeth, and lips shape the sounds into distinct phonemes used in speech.

Phonology focuses on the way sounds are organized and used in languages. It examines the patterns of sounds in a language and how these sounds interact with one another. Different languages can have different sets of phonemes, which are the smallest units of sound that can differentiate meaning. Understanding phonology helps us understand rules like which sounds can start or end a word and how sounds change in different contexts.

The English language uses roughly 44 phonemes, which include both vowels and consonants. These phonemes can be grouped into voiced and voiceless sounds, depending on whether the vocal cords vibrate during production. English has 20 vowel sounds, which can be tricky for non-native speakers due to their subtle differences. Consonants, on the other hand, can be categorized based on their place and manner of articulation, such as plosives, fricatives, and nasals.