Acoustic roles of the laryngeal cavity in vocal tract resonance.
Acoustic roles of the laryngeal cavity in vocal tract resonance.
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DOI：
10.1121/1.2261270
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发表时间：
2006-10
期刊：
影响因子：
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通讯作者：
H. Takemoto;S. Adachi;T. Kitamura;P. Mokhtari;K. Honda
中科院分区：
文献类型：
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作者：
H. Takemoto;S. Adachi;T. Kitamura;P. Mokhtari;K. Honda
用声道面积函数研究了喉腔对成年男性日语元音的影响。将喉腔从整个声道中排除后，检查传递函数，计算体积速度分布模式，并在喉腔和排除喉腔的声道（声道本身）之间进行阻抗匹配分析。结果表明，喉腔产生的共振峰之一，这是在本研究的第四个。在这个共振峰处，喉腔的共振（1/4波长共振）引起声道的开管共振（3/2波长共振）。另一方面，在其他共振峰处，声道本身充当封闭管，因为喉腔对产生这些共振峰仅具有很小的贡献，并且整个声道的有效封闭端是喉腔和声道本身之间的接合处。
The acoustic effects of the laryngeal cavity on the vocal tract resonance were investigated by using vocal tract area functions for the five Japanese vowels obtained from an adult male speaker. Transfer functions were examined with the laryngeal cavity eliminated from the whole vocal tract, volume velocity distribution patterns were calculated, and susceptance matching analysis was performed between the laryngeal cavity and the vocal tract excluding the laryngeal cavity (vocal tract proper). It was revealed that the laryngeal cavity generates one of the formants of the vocal tract, which is the fourth in the present study. At this formant, the resonance of the laryngeal cavity (the 1/4 wavelength resonance) induces the open-tube resonance of the vocal tract proper (the 3/2 wavelength resonance). At the other formants, on the other hand, the vocal tract proper acts as a closed tube, because the laryngeal cavity has only a small contribution to generating these formants and the effective closed end of the whole vocal tract is the junction between the laryngeal cavity and the vocal tract proper.