Digital acoustic analysis of five vowels in maxillectomy patients
Digital acoustic analysis of five vowels in maxillectomy patients
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DOI：
10.1046/j.1365-2842.2002.00911.x
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发表时间：
2002-07-01
影响因子：
2.9
通讯作者：
Taniguchi, H
中科院分区：
文献类型：
--
作者：
Sumita, YI;Ozawa, S;Taniguchi, H
该研究的目的是表征上颌切除术患者元音发音的声学特征。对12例男性上颌切除术患者和12例正常男性进行了/a/、/e/、/i/、/o/和/u/ 5个元音的数字声学分析。一组简单的声学描述称为第一和第二形成频率，F1和F2，采用和计算基于线性预测编码。上颌切除术患者5个元音的F2均显著降低，仅/i/元音的F1显著升高。从每个受试者的F1-F2平面上绘制的数据中，我们确定了F1范围和F2范围，即五个元音的最小频率和最大频率之差。上颌切除术患者的F2范围明显窄于正常对照组。相比之下，F1范围无显著差异。结果表明，上颌切除术患者在控制F2方面存在困难。此外，还进行了语音清晰度（SI）测试来验证该方法的结果。F2范围与SI测试得分之间存在较高的相关性，提示F2范围是评价上颌切除术患者言语能力的有效指标。
The aim of the study was to characterize the acoustics of vowel articulation in maxillectomy patients. Digital acoustic analysis of five vowels, /a/, /e/, /i/, /o/ and /u/, was performed on 12 male maxillectomy patients and 12 normal male individuals. A simple set of acoustic descriptions called the first and second formant frequencies, F1 and F2, were employed and calculated based on linear predictive coding. The maxillectomy patients had a significantly lower F2 for all five vowels and a significantly higher F1 for only /i/ vowel. From the data plotted on an F1-F2 plane in each subject, we determined the F1 range and the F2 range, which are the differences between the minimum and the maximum frequencies among the five vowels. The maxillectomy patients had a significantly narrower F2 range than the normal controls. In contrast, there was no significant difference in the F1 range. These results suggest that the maxillectomy patients had difficulty in controlling F2 properly. In addition, the speech intelligibility (SI) test was performed to verify the results of this new frequency range method. A high correlation between the F2 range and the score of SI test was demonstrated, suggesting that the F2 range is effective in evaluating the speech ability of maxillectomy patients.