Accuracy assessment for AG500, electromagnetic articulograph.

Journal of Speech, Language, and Hearing Research : JSLHR
Yana YunusovaAntje S Mefferd

Abstract

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.

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Citations

Aug 12, 2010·Journal of Speech, Language, and Hearing Research : JSLHR·Antje S Mefferd, Jordan R Green
Mar 5, 2011·Journal of Visualized Experiments : JoVE·Yana YunusovaLorne Zinman
Dec 13, 2012·The Journal of the Acoustical Society of America·Massimo StellaBarbara Gili Fivela
May 17, 2011·The Journal of the Acoustical Society of America·Asterios ToutiosYves Laprie
Dec 1, 2013·The Journal of the Acoustical Society of America·Anneke Slis, Pascal Van Lieshout
Jan 28, 2012·The Journal of the Acoustical Society of America·Ryan ShostedPanying Rong
Jan 21, 2014·The Journal of the Acoustical Society of America·Chris Neufeld, Pascal van Lieshout
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Mar 1, 2013·Wiley Interdisciplinary Reviews. Cognitive Science·Ingo Hertrich, Hermann Ackermann
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Apr 19, 2011·Journal of Speech, Language, and Hearing Research : JSLHR·Jeffrey J Berry
Apr 2, 2014·Journal of Speech, Language, and Hearing Research : JSLHR·Yongqiang Feng, Ludo Max
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Feb 6, 2017·Journal of Speech, Language, and Hearing Research : JSLHR·Christophe SavariauxSilvain Gerber
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