are three sounds which are placed in fronting diphthongs. They are the sound [e ] in the word aim [e m], in the sound [a ] in the word ice [a s], and the sound [ ] in
the word oil [ l]. Backing, end with the sound [ ], is produced with the movement towards a close back vowel. There are only two sounds which is placed in backing
diphthongs, they are: the sound [ ə ] in the word phone [fə n], and the sound [ ] in
the word sound [sa nd].
B. Theoretical Framework
In this research, the first grade students experience the process of sound change in learning English language. This research is intended to find out the
phenomena of sound change that occurred in the pronunciation of English words by the first grade students.
First problem formulation is to find out the types of English sound change of the first grade students of Sekolah Menengah Kejuruan Negeri 2 Depok Sleman
Yogyakarta. To answer the first research problem the researcher uses the sound change theory based on Campbell 2004 and Crowley 1992. According to
Campbell and Crowley’s theory there are 9 types of sound change process, they are: assimilation, dissimilation, deletion, sound addition, metathesis,
diphthongization, monophthongization, lenition and strengthening. Second problem formulation is to find out the English speech sounds as
the result of the sound change by the pronunciation of the first grade students of Sekolah Menengah Kejuruan Negeri
2 Depok Sleman Yogyakarta. After analyzing the types of the English sound change which occurs in students’
pronunciation, the researcher discovers the difficult sounds which are occurred in the student’s pronunciation.
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CHAPTER III METHODOLOGY
This chapter presents information on how this study was conducted. The discussions deal with the research method, the research participants, the research
instrument, the data gathering technique, the data analysis technique, and the research procedure.
A. Research Method
The study is a descriptive research. According to Seliger and Shohamy 1989:116 “descriptive research is concerned with providing descriptions on
phenomena that occur naturally, without the intervention of an experiment or an artificially contrived treatment”. This study described the phenomena of the sound
change that occurred in the pronunciation of the first grade students of Sekolah Menengah Kejuruan Negeri
2 Depok Sleman Yogyakarta Descriptive research could be qualitative or quantitative. This research is
categorized as descriptive qualitative because this research deals with data that are in the form of words, rather than numbers and statistic. The data collected in this
study are the participants’ pronunciation. The researcher tried to describe the phenomena that occurred on the students’ pronunciation.
The researcher recorded the learner’s pronunciation by giving students texts to read. The researcher analyzed the recording of the students’ pronunciation
and transcribed the students’ pronunciation into the phonetic transcription. PLAGIAT MERUPAKAN TINDAKAN TIDAK TERPUJI
