Quantitative analysis of subphonemic flap/tap variation in NAE
AbstractThe quantitative analysis of subphonemic flap/tap variation in NAE was investigated. Twenty-four participants were recorded, 12 female, and 12 male. 38 unique stimuli were recorded in twelve randomized blocks. Participants were seated comfortably in an American Optical Co. Ultrasound data were recorded in B/M mode. B-mode was set to record the tongue along the mid-sagittal plane. Three parallel M-mode lines were set following the line of the anterior palate, so as to maximally intersect movement of the tongue tip through the alveolar region. stimuli was presented on an LCD monitor using PXLab in two groups of six blocks of 38 stimuli each, with a break between the two groups. the ultrasound audio and video were separated to allow for accurate acoustic boundary identification. It was observed that the M-mode information allowed for a relatively straightforward identification and distinction of the four kinematic variations of taps and flaps.
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