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Source-tract interaction with prescribed vocal fold motion
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10.1121/1.3685824
/content/asa/journal/jasa/131/4/10.1121/1.3685824
http://aip.metastore.ingenta.com/content/asa/journal/jasa/131/4/10.1121/1.3685824
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic of the vocal tract. The control volume is bounded by the solid walls of the vocal tract and the surfaces between the lips and through the bronchial tubes, denoted SL. The surfaces Ssub and Ssup are used to segment the control volume into three portions: the sub-glottal tract, glottal region, and supra-glottal tract.

Image of FIG. 2.
FIG. 2.

Normalized glottal volume velocity, , versus normalized time, f 0 t, at four different fundamental frequencies. The supra-glottal impedance is that for a semi-infinite tube, (ρ 0 c 0)/A sup. The dark curves have sub-glottal input impedance specified in the text according to Ishizaka et al. (1976) . Sub-glottal formant frequencies, with bandwidths in brackets are 640 Hz (256 Hz), 1400 Hz (156 Hz), and 2100 Hz (175 Hz). The dashed curve for comparison is when the sub-glottal tract is a semi-infinite tube with input impedance (ρ 0 c 0)/A sub. (a) f 0 = 100 Hz, (b) f 0 =280 Hz, (c) f 0 = 400 Hz, and (d) f 0 = 800 Hz.

Image of FIG. 3.
FIG. 3.

Normalized glottal volume velocity, Qnorm = (Q(t)ρ 0 c 0)/(p sub A sub), versus normalized time, f 0 t at four different fundamental frequencies. Sub-glottal resonances are as specified for the dark curve in Fig. 2 . The dark curves are for supra-glottal formants appropriate for /i/, which are, with bandwidths in brackets, 280 Hz (65 Hz), 2250 Hz (98 Hz), and 2750 Hz (113 Hz). The dashed curves are when supra-glottal impedance is (ρ 0 c 0)/A sup for a semi-infinite tube. (a) f 0 = 100 Hz, (b) f 0 =260 Hz, (c) f 0 = 275 Hz, and (d) f 0 = 290 Hz.

Image of FIG. 4.
FIG. 4.

Normalized glottal volume velocity, Qnorm = (Q(t)ρ 0 c 0)/(p sub A sub), versus normalized time, f 0 t at four different fundamental frequencies. Sub-glottal resonances are as specified for the dark curve in Fig. 2 . The dark curves are for supra-glottal formants appropriate for /r/, which are, with bandwidths in brackets, 250 Hz (69 Hz), 700 Hz (54 Hz), and 1400 Hz (73 Hz). The dashed curves are when supra-glottal impedance is (ρ 0 c 0)/A sup for a semi-infinite tube. (a) f 0 = 100 Hz, (b) f 0  =240 Hz, (c) f 0 = 245 Hz, and (d) f 0 = 260 Hz.

Image of FIG. 5.
FIG. 5.

Peak amplitudes for /i/ versus fundamental frequency, f 0 at a distance r = 400 cm from the lips. (a) Normalized far field pressure, 10log10( /p sub) versus f 0, and (b) normalized volume velocity 10log10(Qmaxρ 0 c 0/p sub A sub) versus f 0.

Image of FIG. 6.
FIG. 6.

Peak amplitudes for /r/ versus fundamental frequency, f 0 at a distance r = 400 cm from the lips. (a) Normalized far field pressure, 10log10( /p sub) versus f 0, and (b) normalized volume velocity 10log10(Qmaxρ 0 c 0/p sub A sub) versus f 0.

Image of FIG. 7.
FIG. 7.

Normalized glottal volume velocity, Qnorm = (Q(t)ρ 0 c 0)/(psubAsub ), versus normalized time, f 0 t at four different fundamental frequencies. Sub-glottal resonances are as specified for the dark curve in Fig. 1 . The dark curves are for supra-glottal formants appropriate for /a/, which are, with bandwidths in brackets, 750 Hz (54 Hz), 1100 Hz (64 Hz), and 2600 Hz (108 Hz). The dashed curves are when supra-glottal impedance is (ρ 0 c 0)/Asup for a semi-infinite tube. (a) f 0 = 100 Hz, (b) f 0  =650 Hz, (c) f 0 = 745 Hz, and (d) f 0 = 800 Hz.

Image of FIG. 8.
FIG. 8.

Peak amplitudes for /a/ versus fundamental frequency, f 0 at a distance r = 400 cm from the lips. (a) Normalized far field pressure, 10log10( /p sub) versus f 0, and (b) normalized volume velocity 10log10(Qmaxρ 0 c 0/p sub A sub) versus f 0.

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/content/asa/journal/jasa/131/4/10.1121/1.3685824
2012-04-12
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Source-tract interaction with prescribed vocal fold motion
http://aip.metastore.ingenta.com/content/asa/journal/jasa/131/4/10.1121/1.3685824
10.1121/1.3685824
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