From: A Comparison of Methods for Decoupling Tongue and Lower Lip From Jaw Movements in 3D
Articulography
J Speech Lang Hear Res. 2013;56(5):1503-1516. doi:10.1044/1092-4388(2013/12-0016)
Legend:
Schematic representation of the steps that the JOANA method follows to estimate a frame of reference for the lower jaw: the horizontal (x) axis
of the frame of reference is defined by the measured orientation of the CI, shown in panel A; the vertical (z) axis is estimated by the cross
product between the estimated x-axis and the vector t, which is a unit vector whose direction is pointing away from the position of the RH sensor
to the position of the LH sensor, as shown in panel B; the y axis is estimated by the cross product between the z-axis and x-axis, shown in panel
C. It is important to note that by estimating the z-axis,
we assume
that the
jaw does not have any roll rotation. See text for more details.
Copyright
© American
Speech-LanguageDate of download: 7/31/2017
Hearing Association