Relevance of the Implementation of Teeth in Three-Dimensional Vocal Tract Models.
Relevance of the Implementation of Teeth in Three-Dimensional Vocal Tract Models.
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三维声带模型中牙齿实施的相关性
DOI：
10.1044/2017_jslhr-s-16-0395
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Echternach
中科院分区：
文献类型：
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作者：
Traser;Birkholz;Flügge;Kamberger;Burdumy;Richter;Korvink;Echternach
目的近年来，利用磁共振成像（MRI）对声道进行了研究。由于技术上的限制，在以往的许多声道声学研究中都忽略了牙齿。然而，牙齿如何影响声道声学的知识可能是重要的，以便估计在声道模型中实施牙齿的必要性。因此，本研究的目的是评估牙齿对声道声学的影响。方法将18个无牙实体（三维打印）声道模型与18个含牙声道模型的声学特性进行共振频率（fRn）比较。这些模型在声门水平上受白噪声的激励得到传递函数。这些模型来源于2名训练有素的歌手在语音和低、高音演唱中表现3种不同元音条件（/i/， /a/和/u/）的MRI数据。结果根据口腔结构的不同，出现侧腔或侧分支的模型在通过引入极-零对植入牙齿时传递函数发生了重大变化。结论为避免造模误差，应将牙齿纳入三维声道模型进行声学评价。补充Materialhttps: / / doi.org/10.23641/asha.5386771
PurposeRecently, efforts have been made to investigate the vocal tract using magnetic resonance imaging (MRI). Due to technical limitations, teeth were omitted in many previous studies on vocal tract acoustics. However, the knowledge of how teeth influence vocal tract acoustics might be important in order to estimate the necessity of implementing teeth in vocal tract models. The aim of this study was therefore to estimate the effect of teeth on vocal tract acoustics.MethodThe acoustic properties of 18 solid (3-dimensional printed) vocal tract models without teeth were compared to the same 18 models including teeth in terms of resonance frequencies (fRn). ThefRnwere obtained from the transfer functions of these models excited by white noise at the glottis level. The models were derived from MRI data of 2 trained singers performing 3 different vowel conditions (/i/, /a/, and /u/) in speech and low-pitched and high-pitched singing.ResultsDepending on the oral configuration, models exhibiting side cavities or side branches were characterized by major changes in the transfer function when teeth were implemented via the introduction of pole-zero pairs.ConclusionsTo avoid errors in modeling, teeth should be included in 3-dimensional vocal tract models for acoustic evaluation.Supplemental Materialhttps://doi.org/10.23641/asha.5386771