DETERMINATION OF SAGITTAL TONGUE SHAPE FROM THE POSITIONS OF POINTS ON THE TONGUE SURFACE
DETERMINATION OF SAGITTAL TONGUE SHAPE FROM THE POSITIONS OF POINTS ON THE TONGUE SURFACE
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DOI：
10.1121/1.410280
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发表时间：
1994-09-01
影响因子：
2.4
通讯作者：
HONDA, M
中科院分区：
文献类型：
--
作者：
KABURAGI, T;HONDA, M
本文描述了一种由舌面各点位置确定舌中矢状面轮廓形状的方法。使用交变磁场装置和超声b型扫描仪同时测量舌形和舌点的位置。磁性和超声波数据的比较表明，两种数据的平均测量差为1.16 mm。然后用磁确定位置的多变量线性回归来表示舌形轮廓的形状。回归分析结果表明，从舌头的四个位置估计舌头轮廓，平均估计误差为1.24 mm。当磁测数据与超声数据之间不存在测量误差时，该估计误差可降至0.84 mm，当磁性装置的接收线圈在舌上的最佳位置时，该估计误差可降至0.43 mm。通过适当选择数据帧，可以在保持估计精度的前提下减少用于计算回归系数的数据帧数。最后，通过磁性确定的位置成功地估计了几个音素的舌头形状，从而证明了这种方法在观察舌头发音结构方面的实用性。
This paper describes a method for determining the shape of the midsagittal tongue contour from the positions of points on the tongue surface. The positions of the points and the tongue shape were measured simultaneously by using an alternating magnetic field device and an ultrasonic B-mode scanner for continuous speech utterances. A comparison between the magnetic and the ultrasonic data revealed that the average measurement difference between the two types of data was 1.16 mm. The shape of the tongue contour was then represented by multivariable linear regression of the magnetically determined positions. The results of the regression analysis showed that the tongue contour was estimated, from four positions on the tongue, with an average estimation error of 1.24 mm. This estimation error could be reduced to 0.84 mm when there was no measurement error between the magnetic and the ultrasonic data, and it was further reduced to 0.43 mm when the receiver coils of the magnetic device were positioned optimally on the tongue. It was also shown that the number of data frames for calculating the regression coefficients could be reduced, while maintaining the estimation accuracy, by appropriately selecting data frames. Finally, the tongue shape was estimated successfully for several phonemes from the magnetically determined positions, thus demonstrating the usefulness of this method for observing the articulatory configuration of the tongue.