Develop a new technique for measuring tongue and mandibular movement

有几种方法可以用来观察舌头和下颌在说话时的运动。然而，由于避免过多的x射线曝光和从图像中分析数据的繁琐，这些技术获得的数据在数量上是有限的。本研究的目的是开发一种测量舌下颌骨运动的新技术，并在实际中应用。该方法的基本原理是利用磁力计与置于舌尖的磁棒之间的距离变化所引起的磁力计输出变化，将得到的模拟数据转换为数字数据，并由微型计算机软件解释磁棒的位置。声学数据与舌和下颌运动同步。利用该系统可以准确地评价舌和下颌骨的动态特性（位移、发音延迟、速度和累计位移）。由此可见，该测量装置对舌、下颌运动无畸变的测量具有一定的价值，测量精度最高可达5.3%，动态响应速度转换后约为500 cm/s。因此，可以得出结论，这种新系统对于语言的生理研究是一种有用的技术。

Several methods have been used to observe the tongue and mandibular movement in speech. However, data obtained by these techniques are quantitatively limited because of avoidance to excessive X-ray exposure and tediousness of analyzing data from the images. The purpose of this study is to develop a new technique for measuring tongue and mandibularmovement and to use actually.The basic principle of this method is to use the output changes induced in magnetmeters due to the changes of the distance between the magnetmeters and a magnetic rod placed on the tip of the tongue analog data obtained are converted into digital data and the position of the rod is interpreted by the software of micro computer. Acoustic data are synchronized with tongue and mandibular movement. By use of this system, the dynamic characteristics ( displacement, delay of phonetic onset, velocity and cumulative displacement) of tongue and mandibule can be exactly evaluated.It becomes clear that this measuring device is valuable for the investigation of tongue and mandibular movement without distortion and with accuracy of 5.3% at most, and dynamic response shows about 500 cm/s as a velocity converted. It is, then, concluded that this new system is a useful technique for physiological research of speech.