Sari Emel, Kiliç Mehmet Akif
Gölcük Military Hospital, Izmit, Turkey.
Clin Linguist Phon. 2009 Jun;23(6):393-403. doi: 10.1080/02699200802716074.
The objective of this study was to investigate the effect of surgical rapid maxillary expansion (SRME) on vowel production. The subjects included 12 patients, whose speech were considered perceptually normal, that had undergone surgical RME for expansion of a narrow maxilla. They uttered the following Turkish vowels, ([a], [e], [dotless i], [i], [o], [oe], [u], [y]), in isolation before and after the maxillary expansion. These samples were recorded for acoustical analysis. The fundamental frequencies (F0) and the frequencies and bandwidths of the first two formants (F1 and F2) of the vowels were measured using the Multi-Speech programme (Kay Elemetrics). Statistical analysis revealed that the second formant frequency (F2) and bandwidth values in the vowel [i] and [oe] were lowered after maxillary expansion (p<.05). Surgical RME induced the decrease in the second formant of the [i] and [oe] vowels by affecting the size of the anterior oral cavity, however the influence was too small to cause any differences in the acoustic properties of the other vowels.
本研究的目的是调查外科快速上颌扩弓（SRME）对元音发音的影响。研究对象包括12名患者，他们的语音在感知上被认为是正常的，且因上颌骨狭窄接受了外科快速上颌扩弓治疗。他们在快速上颌扩弓前后分别单独发出以下土耳其语元音（[a]、[e]、[无点i]、[i]、[o]、[ö]、[u]、[ü]）。这些样本被录制下来用于声学分析。使用Multi-Speech程序（Kay Elemetrics）测量元音的基频（F0）以及前两个共振峰（F1和F2）的频率和带宽。统计分析显示，上颌扩弓后，元音[i]和[ö]的第二共振峰频率（F2）和带宽值降低（p<0.05）。外科快速上颌扩弓通过影响口腔前部的大小，导致[i]和[ö]元音的第二共振峰降低，然而这种影响太小，以至于未对其他元音的声学特性造成任何差异。
