ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06

4aSC21. EMMA and x-ray microbeam comparison.

Dani Byrd

Haskins Labs., 270 Crown St., New Haven, CT 06511-6695

Catherine P. Browman

Haskins Labs.

Louis Goldstein, and Douglas Honorof

Haskins Labs.

Yale Univ.

In the past, much articulatory movement data have been obtained using the x-ray microbeam. Currently, however, magnetometer systems such as EMMA are becoming predominant. A unique data set, addressing concerns of consistency between these instruments is reported. A single speaker was recorded with both instruments reading the same utterances: ``It's a [pV'CVp] again.'' Data from two x-ray microbeam (XRMB) runs were collected on the same day (pellets re-placed for the second run); 27 months later the parallel EMMA data were collected. Vertical movement of the lower lip, tongue tip, and tongue body during the VCV's was analyzed. Extrema positions (amplitudes) and distance and time between these positions (gestural displacements and durations) were obtained. The results demonstrate that the correlation between EMMA and XRMB runs is very high, almost as high as that between the two XRMB runs. r values (p<0.0001) amplitude displacement duration XRMB-1 & EMMA 0.9898 0.8615 0.7570 XRMB-2 & EMMA 0.9852 0.8948 0.7210 XRMB-1 & XRMB-2 0.9901 0.9107 0.7933