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Speech Motor ControlNew developments in basic and applied research$
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Ben Maassen and Pascal van Lieshout

Print publication date: 2010

Print ISBN-13: 9780199235797

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780199235797.001.0001

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Five-dimensional articulography

Five-dimensional articulography

Chapter:
(p.331) Chapter 20 Five-dimensional articulography
Source:
Speech Motor Control
Author(s):

Phil Hoole

Andreas Zierdt

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199235797.003.0020

This chapter reviews current developments in the use of five-dimensional electromagnetic articulography for speech research. Obvious advantages are higher information density per sensor (three Cartesian coordinates, two spherical coordinates) compared to traditional 2D EMMA systems, and the removal of the necessity to constrain the subject's head. The drawbacks are equally related to this higher dimensional space: position calculation involves solving a non-linear optimization problem. In some cases, unstable solutions are encountered, resulting in mistrackings. The chapter illustrates how the higher information density allows particularly succinct and robust characterizations of tongue configuration. Discussion also focuses on monitoring of head movement. This is crucial for accurate recovery of articulator movements themselves, but is also intrinsically interesting as part of speech motor activity. In addition to improving the naturalness of the speaking situation, the freedom of head movement also means that subjects tolerate longer recording sessions. This can facilitate new experimental paradigms.

Keywords:   5D electromagnetic articulography, speech research, tongue configuration, speech motor activity

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