14th International Congress of Phonetic Sciences (ICPhS-14)

San Francisco, CA, USA
August 1-7, 1999

Kinematic Analysis of Lower Lip-Jaw and Tongue-Jaw Interactions during Syllable Repetitions: Some Aspects of Motor Equivalence

Ingo Hertrich, Hermann Ackermann

University of Tübingen, Germany

A rate-controlled syllable repetition task (/pa/, /pi/, /ta/, /ti/; 3 and 5 syllables per second) was used to study the effects of jaw - lower lip and jaw - tongue tip coordination on differential movement amplitudes. In some cases, significant negative covariation across repetitions emerged, but the opposite constellation was observed as well. Considering the systematic effects of vowel context and syllable rate, the jaw showed some independency from the lower lip and the tongue. However, the differential functional role of jaw contribution to the compound gestures varied across speakers and conditions. These findings are at variance with the suggestion of a speaker-independent gestural organization of speech units at the stage of phonological processing.

Full Paper

Bibliographic reference.  Hertrich, Ingo / Ackermann, Hermann (1999): "Kinematic analysis of lower lip-jaw and tongue-jaw interactions during syllable repetitions: some aspects of motor equivalence", In ICPhS-14, 1781-1784.