A methodological study is presented to examine the acoustic role of the vocal tract in playing the trumpet. Preliminary results obtained for one professional player are also shown to demonstrate the effectiveness of the method. Images of the vocal tract with a resolution of 0.5 mm (2 mm in thickness) were recorded with magnetic resonance imaging to observe the tongue posture and estimate the vocal-tract area function during actual performance. The input impedance was then calculated for the player's air column including both the supra- and subglottal tracts using an acoustic tube model including the effect of wall losses. Finally, a time-domain blowing simulation by Adachi and Sato [J. Acoust. Soc. Am. 99, 1200-1209 (1996)] was performed with a model of the lips. In this simulation, the oscillating frequency of the lips was slightly affected by using different shapes of the vocal tract measured for the player. In particular, when the natural frequency of the lips was gradually increased, the transition to the higher mode occurred at different frequencies for different vocal-tract shapes. Furthermore, simulation results showed that the minimum blowing pressure required to attain the lip oscillation can be reduced by adjusting the vocal-tract shape properly.
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机译：提出了一种方法学研究来检查声道在吹小号中的声学作用。还显示了针对一名职业球员的初步结果，证明了该方法的有效性。通过磁共振成像记录分辨率为0.5毫米（厚度2毫米）的声道图像，以观察舌头姿势并在实际演奏过程中估计声道区域功能。然后使用声管模型（包括壁面损失的影响），为演奏者的气柱计算输入阻抗，包括上声道和声门下声道。最后，由Adachi和Sato提出的时域吹动仿真[J. co Soc。上午。 99，1200-1209（1996）]用嘴唇模型进行。在此模拟中，通过使用为演奏者测量的不同声带形状，对嘴唇的振荡频率略有影响。特别地，当嘴唇的固有频率逐渐增加时，对于不同的声道形状，以不同的频率发生了向更高模式的过渡。此外，仿真结果表明，通过适当调整声道形状，可以降低达到唇部振动所需的最小吹气压力。
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