| Autor: |
Piroli, J., Daniloff, R., Miller, C. J. |
| Zdroj: |
Journal of the Acoustical Society of America; 1991, Vol. 89 Issue 4B, p1980-1980, 1p |
| Abstrakt: |
Three hundred quasisyllabic utterances were excerpted from the vocalizations of three infants at monthly intervals in the 4- to 14th-month epoch of development. Samples were recorded while at play with the mother in a toy-filled, sound-treated chamber. F1, F2, f0, and I0, trajectories for the entire quasisyllable were extracted from digital FFT/waveform displays. Syllable, consonant, vowel and transition durations, formant and I0 envelope velocities, and jitter ad shimmer measurement were made. Natural-class transcriptions and articulatory 'well-formedness' evaluations were made for each utterance. A behavioral analysis checklist was available for each utterance. Analysis revealed that even perceptually labelable seemingly unexceptional tokens displayed combinations of nonadult-like acoustic parameters. Tokens were sorted by clusters of variables into a typology of emergent syllabic forms based upon adult and nonadult-like values of the classificatory acoustic-perceptual variables. The syllable well-formedness related complexly to the infant's attributed intent to communicate. The prelinguistic utterances were considerably more 'juvenile' acoustically than perception would lead one to believe. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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