What is Phonology?

Phonology is a branch of linguistics that studies how languages or dialects systematically organize their sounds. The term refers also to the sound or sign system of any particular language variety. At one time, the study of phonology related only to the study of the systems of phonemes in spoken languages, but may now relate to

Sign languages have a phonological system equivalent to the system of sounds in spoken languages. The building blocks of signs are specifications for movement, location, and handshape. At first, a separate terminology was used for the study of sign phonology , but the concepts are now considered to apply universally to all human languages.