Original Article

Rongga mulut mempengaruhi pola spektrum frekuensi suara pada penerapan klinis pengucapankataBahasa Indonesia:Pada anaklaki-laki usia 9 dan12tahun dengan maloklusi klas I Angle variasi berjejal (Oral cavity affect spectrum pattern ofvoice frequencyonclinicalimplementation of pronuncingwords in BahasaIndonesia : On 9 and 12-year-old boys in Angle Class I malocclusion with crowding variation)

Rinaldi Budi Utomo

Rinaldi Budi Utomo
Departemen Ilmu Kedokteran Gigi Anak Fakultas Kedokteran Gigi Universitas Gadjah Mada Yogyakarta, Indonesia. Email: iwasrs@yahoo.co.id
Online First: February 28, 2015 | Cite this Article
Utomo, R. 2015. Rongga mulut mempengaruhi pola spektrum frekuensi suara pada penerapan klinis pengucapankataBahasa Indonesia:Pada anaklaki-laki usia 9 dan12tahun dengan maloklusi klas I Angle variasi berjejal (Oral cavity affect spectrum pattern ofvoice frequencyonclinicalimplementation of pronuncingwords in BahasaIndonesia : On 9 and 12-year-old boys in Angle Class I malocclusion with crowding variation). Journal of Dentomaxillofacial Science 14(1): 38-44. DOI:10.15562/jdmfs.v14i1.424


The aim of this study was to determine the effect of cavum oris to spectrum pattern of voice frequency on the clinical
implementation of pronouncing 7 words in a list of Indonesian words by 9 and 12 year-old children in Angle Class I
malocclusion with crowding variation. Analytical epidemiologic study with cross sectional design was performed in one
time measurement on the subject. The research subjects were 24 Javanese boys, who used standard and correct Bahasa
Indonesia. They were divided into two age-based groups: 12 children of 9 years old and 12 children of 12 years old. These
two groups pronounced the seven words in the list which have frequency in their dominant sounds on Angle class I
malocclusion with crowding variation. They are /produktif
/, /mushola/, /rupiah/, /identifikasi/, /yodium/, /hinggap/, and
/hujan/. The sound was directly recorded in sound-proof room employing sound recorder program, flat microphone
and sound processing mixer. Then the dominant sound frequency was measuredtogether with spectrum patterns of voice
frequency display by usingCoolEdit Pro 2
.0andExcel software. Theresults showedcavumoris volume of 9-year-old male
children is smaller than that of 12-year-old children. The spectrum pattern of voice frequency of the 7 words showed that
the pattern and frequency chart equations of the 9 year-olds are of a lower amplitude and thinner pattern than those of
the 12-year olds.

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