Phonological Acquisition (Case Study on Indonesian Child)

This study aims to describe the acquisition of phonology including the acquisition of vowels, consonants, and diphthongs obtained by aIndonesian child. The research design used uses a qualitative method with a longitudinalcase study approach by following child's language development from 0 months to 4 years old, named KS. The findings of this study were that KS had obtained a complete vocal phoneme at 2;0 years old. Diphthong sound is mastered entering at 3;0 years. Consonant starts to be mastered at 2;0 years, however fricative sound [f], the sound of vibration [r] has not been mastered until the age of 4 years. Uniquely, if the consonant sounds located at the end of the word, KS replace it with a [n]. This happens because speech motor KS is incomplete or not yet fully developed. Thus, at the age of 4 years old, KS has been able to recite and obtain most of the phonemes in Indonesian.