On the psychoacoustic nature of the P-center phenomenon  

Oleh:

Pompino-Marschall, Bernd

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Journal of Phonetics vol. 17 no. 3 (Jul. 1989), page 175-192.

Ketersediaan

Perpustakaan PKBB Nomor Panggil: 405/JOP/17 Non-tandon: tidak ada Tandon: 1

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Isi artikel

It seems almost generally accepted that the P-center, defined as the psychological moment of occurrence of a syllable, is only determined by the duration of the syllable's consonantal onset and of its rhyme, independently of one another and independent of their phonetic categorization. Summing up the results of a number of our own experiments-already described elsewhere-it will be shown that in contrast to this view (l) the effect of prevocalic consonant duration is not independent of vowel duration and vice versa and that both effects are non-linear, (2) the syllable's rhyme does not affect its P-center as a unit, but that there are also different effects of vowel and final consonant duration, again interacting with one another, and (3) phonetically different syllables behave differently and that P-center shifts can also be induced by non-temporal variations. An elaboration of a purely psychoacoustic model-proposed elsewhere-based on the time course of the loudness within each critical band [sone/Bark] can account for all these effects fairly well. Furthermore, this model distinguishes between "points of onset" and "temporal centers of gravity", which both seem to be psychologically relevant factors in experimental tasks involving subjectively regular rhythm. Finally the P-center phenomenon is discussed in connection with the predictions of this perceptual model and with current models of articulatory timing.

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