Yunusova Yana, Green Jordan R, Mefferd Antje
Department of Speech and Language Pathology, University of Toronto, Toronto, Ontario, Canada.
J Speech Lang Hear Res. 2009 Apr;52(2):547-55. doi: 10.1044/1092-4388(2008/07-0218). Epub 2008 Aug 22.
The goal of this article was to evaluate the accuracy and reliability of the AG500 (Carstens Medizinelectronik, Lenglern, Germany), an electromagnetic device developed recently to register articulatory movements in three dimensions. This technology seems to have unprecedented capabilities to provide rich information about time-varying positions of articulators. However, strengths and weaknesses of the system need to be better understood before the device is used for speech research.
Evaluations of the sensor positions over time were obtained during (a) movements of the calibration device, (b) manual movements of sensors in a cartridge within the recording field of the cube, and (c) various speech tasks.
Results showed a median error to be under 0.5 mm across different types of recordings. The maximum error often ranged between 1 and 2 mm. The magnitude of error depended somewhat on the task but largely on the location of the sensors within the recording region of the cube.
The performance of the system was judged as adequate for speech movement acquisition, provided that specific steps are taken for minimizing error during recording and for validating the quality of recorded data.
本文的目的是评估AG500（德国伦格勒恩的卡斯滕斯医学电子公司）的准确性和可靠性，这是一种最近开发的用于三维记录发音运动的电磁设备。这项技术似乎具有前所未有的能力，能够提供有关发音器官随时间变化位置的丰富信息。然而，在该设备用于语音研究之前，需要更好地了解该系统的优缺点。
在以下过程中获取传感器位置随时间的评估结果：(a)校准设备的移动；(b)在立方体记录区域内，传感器在盒中的手动移动；(c)各种语音任务。
结果表明，在不同类型的记录中，中位数误差小于0.5毫米。最大误差通常在1至2毫米之间。误差的大小在一定程度上取决于任务，但很大程度上取决于传感器在立方体内记录区域中的位置。
如果采取特定步骤以在记录过程中最小化误差并验证记录数据的质量，则该系统的性能被判定为足以进行语音运动采集。
