Diversity of articulatory tongue movements and acoustic characteristics of palatalized articulation were analyzed in producing the plosives/t,d/. The subjects were 10 postoperative cleft palate patients, ranging from 5 to 8 years old. Two patterns of tonguepalate contact were confirmed in the maximum contact: 1) contact of the tongue blade over the whole part of the hard palate, 2) contact of the back of the tongue to the posterior end or to the middle of the hard palate. It was observed that

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... storted sounds were produced due to erroneous contact of the tongue at various points, ranging from the anterior part of the hard palate to the soft palate. Among the acoustic features of the plosives produced by the subjects, the peak energy frequency of the burst and the second formant transition when the plosive is followed by [e] were different, corresponding to the articulatory points. The voice onset time was not consistent with the corresponding articulatory points , however.