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. Author manuscript; available in PMC: 2010 Feb 24.
Published in final edited form as: J Acoust Soc Am. 1999 Mar;105(3):1864–1876. doi: 10.1121/1.426723

FIG. 1.

FIG. 1

Acoustic and movement signals recorded during the production of the utterance “Say api again” by subject VG. In addition to the derived lip aperture signal, its first and second derivatives are shown. The labels in the audio signal correspond to the onset and release of the oral closure for the consonant, and the onset of the second vowel in /api/. The label in the lip aperture acceleration signal marks the onset of the lip closing movement for the consonant. The labels in the tangential velocity signal of the tongue body identify the onset and offset of the tongue movement from the first to the second vowel in /api/. The top panel shows the receiver trajectories from the first to the second vowel and also the part of the trajectory made during the oral closure for the consonant.