TY  - JOUR
A1  - Abakarova, Dzhuma
A1  - Iskarous, Khalil
A1  - Noiray, Aude
T1  - Quantifying lingual coarticulation in German using mutual information
BT  - an ultrasound study
JF  - The journal of the Acoustical Society of America
N2  - In previous research, mutual information (MI) was employed to quantify the physical information shared between consecutive phonological segments, based on electromagnetic articulography data. In this study, MI is extended to quantifying coarticulatory resistance (CR) versus overlap in German using ultrasound imaging. Two measurements are tested as input to MI: (1) the highest point on the tongue body and (2) the first coefficient of the discrete Fourier transform (DFT) of the whole tongue contour. Both measures are used to examine changes in coarticulation between two time points during the syllable span: the consonant midpoint and the vowel onset. Results corroborate previous findings reporting differences in coarticulatory overlap in German and across languages. Further, results suggest that MI used with the highest point on the tongue body captures distinctions related both to place and manner of articulation, while the first DFT coefficient does not provide any additional information regarding global (whole tongue) as opposed to local (individual articulator) aspects of CR. However, both methods capture temporal distinctions in coarticulatory resistance between the two time points. Results are discussed with respect to the potential of MI measure to provide a way of unifying coarticulation quantification methods across data collection techniques.
Y1  - 2018
U6  - https://doi.org/10.1121/1.5047669
SN  - 0001-4966
SN  - 1520-8524
VL  - 144
IS  - 2
SP  - 897
EP  - 907
PB  - American Institute of Physics
CY  - Melville
ER  -