An MRI-based acoustic study of Mandarin vowels
An MRI-based acoustic study of Mandarin vowels
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DOI：
10.21437/interspeech.2013-157
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Yuguang Wang;J. Dang;X. Chen;Jianguo Wei;Hongcui Wang;K. Honda
中科院分区：
文献类型：
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作者：
Yuguang Wang;J. Dang;X. Chen;Jianguo Wei;Hongcui Wang;K. Honda
本研究旨在利用核磁共振成像技术探讨汉语持续元音的声学特征。从八位中国人（六男两女）的体积MRI图像中提取了普通话元音声道的横截面积函数。声学分析进行了元音记录从每个扬声器。声学分析包括测量和计算共振峰之间的比较，元音空间，简化模型的普通话元音，声道长度和共振峰频率之间的相关性。八名受试者计算的10个普通话元音共振峰的平均绝对误差范围为4.6%至11%。Simple-model对普通话元音也有很好的近似。由于该简单模型能给出声学特性与声道特性之间相对清晰的关系，有助于直观地理解语音产生的机制。相关分析表明，普通话元音的声道长度与前四个共振峰总体上呈负相关，这比另一个研究小组最近的研究显示出更明显的相关性。
This study aims at exploring detailed acoustic characteristics of Mandarin sustained vowels based on magnetic resonance imaging (MRI). Cross-sectional area functions of the vocal tract for Mandarin vowels were extracted from volumetric MRI images obtained from eight Chinese speakers (six-male and two-female subjects). Acoustic analysis was performed for the vowels recorded from each speaker. The acoustic analysis includes comparisons between measured and calculated formants, vowel space, simplified models for Mandarin vowels, and correlation between vocal tract length and formant frequencies. Mean absolute errors of calculated formants across 10 Mandarin vowels over eight subjects ranged from 4.6% to 11%. Simple-model also offers good approximations for Mandarin vowels. Since the simple model can give relatively clear relation between acoustic characteristics and vocal tract properties, it is useful for intuitively understanding the mechanism of speech production. The correlation analysis suggests that there exist negative correlations between vocal tract length and first four formants for Mandarin vowels in general, which showed a clearer relation than a recent study by another research group.