Phonology
Overview
 
Phonology is, broadly speaking, the subdiscipline of linguistics
Linguistics
Linguistics is the scientific study of human language. Linguistics can be broadly broken into three categories or subfields of study: language form, language meaning, and language in context....

 concerned with the sounds of language. That is, it is the systematic use of sound
Sound
Sound is a mechanical wave that is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations.-Propagation of...

 to encode meaning in any spoken human language
Human language
A human language is a language primarily intended for communication among humans. The two major categories of human languages are natural languages and constructed languages...

, or the field of linguistics studying this use. In more narrow terms, "phonology proper is concerned with the function, behaviour and organization of sounds as linguistic items". Just as a language has syntax
Syntax
In linguistics, syntax is the study of the principles and rules for constructing phrases and sentences in natural languages....

 and vocabulary
Vocabulary
A person's vocabulary is the set of words within a language that are familiar to that person. A vocabulary usually develops with age, and serves as a useful and fundamental tool for communication and acquiring knowledge...

, it also has a phonology in the sense of a sound system.
 
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