The Phonology is a branch of linguistics concerned with the systematic organization of sounds in languages.
It has traditionally focused
largely on the study of the systems of phonemes in particular languages
(and therefore used to be also called phonemics, or phonematics), but it
may also cover any linguistic analysis either at a level beneath the
word (including syllable, onset and rime, articulatory gestures,
articulatory features, mora, etc.) or at all levels of language where
sound is considered to be structured for conveying linguistic meaning.