Simplify the following text for a Grade 9 native English-speaking person.
Original: The term `` phonology '' was used in the linguistics of a greater part of the 20th century as a cover term uniting phonemics and phonetics . Current phonology can interface with disciplines such as psycholinguistics and speech perception , resulting in specific areas like articulatory or laboratory phonology .
Simplified: Phonology is part of linguistics , which is the scientific study of language .