Modeling the Vocal Tract Transfer Function Using a 3D Digital Waveguide Mesh
Modeling the Vocal Tract Transfer Function Using a 3D Digital Waveguide Mesh
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DOI：
10.1109/taslp.2013.2294579
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发表时间：
2014-02-01
影响因子：
5.4
通讯作者：
Howard, David
中科院分区：
文献类型：
--
作者：
Speed, Matt;Murphy, Damian;Howard, David
数字波导网格已被证明能够再现圆柱形声道模拟的声学脉冲响应。本研究将相同的方法扩展到一组受过训练的受试者从磁共振成像获得的声道图形模型的声学响应的三维模拟。通过声道传递函数的这种模拟和与适当的源波形的卷积，基本音素被重新合成并与基准音频记录进行比较。描述了用于模拟的技术和技巧，以及用于图像捕获的协议和用于收集基准音频的过程。然后对模拟结果和声学记录进行了评价和比较。评估了三维模拟与现有低维等效物相比的价值。据发现，虽然三维仿真提供了一个强有力的代表性的低频声道传递函数，在较高的频率，其性能变得依赖于几何形状。提供MRI成像和基准音频用于未来研究，并允许与声学模拟的可比方法进行比较。
The digital waveguide mesh has been shown to be capable of reproducing the acoustic impulse response of cylindrical vocal tract analogs. This study extends the same methodology to three-dimensional simulation of the acoustic response of graphical models of the vocal tract obtained from magnetic resonance imaging for a group of trained subjects. By such simulation of the vocal tract transfer function and convolution with an appropriate source waveform, basic phonemes are resynthesized and compared with benchmark audio recordings. The technologies and techniques used for simulation are described, alongside the protocol for image capture and the process for collection of benchmark audio. The results of simulation and acoustic recording are then evaluated and compared. The value of three-dimensional simulation in comparison to existing lower-dimensionality equivalents is assessed. It is found that while three-dimensional simulation provides a strong representation of the low frequency vocal tract transfer function, at higher frequencies its performance becomes geometry-dependent. MRI imaging and benchmark audio is provided for future studies and to permit comparison with comparable means of acoustic simulation.