Effects of a vocal-tract constriction on the glottal source: experimental and modelling studies  

Oleh:

Stevens, Kenneth N. ; Bickley, C. A.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Journal of Phonetics vol. 14 no. 3/4 (Dec. 1986), page 373 - 382.

Ketersediaan

Perpustakaan PKBB Nomor Panggil: 405/JOP/14 Non-tandon: tidak ada Tandon: 1

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Isi artikel

The effects of a vocal-tract constriction on the glottal source were examined, based on acoustic and electroglottographic (EGG) data. Six subjects phonated through an apparatus in which constrictions of various sizes were alternated with a relatively unconstricted configuration. Measurements of glottal open time were made from the EGG data, and the effect of the constriction on glottal pulse shape was inferred from the spectrum of the acoustic signal. The data show a longer open time for the more constricted configurations, as well as a decreased pulse area, less abrupt closing slope of the pulse, and wider bandwidth of the first formant. Variability in all of the measures was apparent across subjects. We also examined the behavior of a two-mass model of the vocal folds which it is coupled to vocal-tract configurations with various degrees of constriction. There was general agreement between the glottal pulse waveforms generated by the model and those inferred from the speech experiments.

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