TY - JOUR
T1 - Source-filter interaction in phonation
T2 - A study using vocal-tract data of a soprano singer
AU - Kaburagi, Tokihiko
AU - Ando, Momoyo
AU - Uezu, Yasufumi
N1 - Funding Information:
This research was party supported by JSPS KAKENHI Grant Number JP16K00242.
Publisher Copyright:
#2019 The Acoustical Society of Japan
PY - 2019
Y1 - 2019
N2 - We simulated acoustic interaction between the voice source system in the larynx and the acoustic filter of the vocal tract. The vocal tract of a soprano was first scanned in three dimensions using magnetic resonance imaging while she produced four musical notes (A3, E4, D5, and A5) with /a/ and /i/. These images were used to simulate voice production, including the vibratory motion of the vocal folds and the behavior of glottal airflow. Images for the /i/ vowel were used in the simulation, because a good proximity relationship was found between the fundamental frequency and the first impedance peak of the vocal tract. The simulation results revealed that the fundamental frequency (vibration frequency of the vocal folds) was decreased to a large extent by the interaction especially when their natural frequency was in the proximity of the impedance peak. In a specific case, the acoustic load of the vocal tract exerted on the vocal folds changed as a result of the interaction, so the vibratory motion was effectively assisted. These interaction effects were also examined in terms of the phase relation among the temporal waveforms of the glottal variables.
AB - We simulated acoustic interaction between the voice source system in the larynx and the acoustic filter of the vocal tract. The vocal tract of a soprano was first scanned in three dimensions using magnetic resonance imaging while she produced four musical notes (A3, E4, D5, and A5) with /a/ and /i/. These images were used to simulate voice production, including the vibratory motion of the vocal folds and the behavior of glottal airflow. Images for the /i/ vowel were used in the simulation, because a good proximity relationship was found between the fundamental frequency and the first impedance peak of the vocal tract. The simulation results revealed that the fundamental frequency (vibration frequency of the vocal folds) was decreased to a large extent by the interaction especially when their natural frequency was in the proximity of the impedance peak. In a specific case, the acoustic load of the vocal tract exerted on the vocal folds changed as a result of the interaction, so the vibratory motion was effectively assisted. These interaction effects were also examined in terms of the phase relation among the temporal waveforms of the glottal variables.
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U2 - 10.1250/ast.40.313
DO - 10.1250/ast.40.313
M3 - Article
AN - SCOPUS:85072219040
VL - 40
SP - 313
EP - 324
JO - Journal of the Acoustical Society of Japan (E) (English translation of Nippon Onkyo Gakkaishi)
JF - Journal of the Acoustical Society of Japan (E) (English translation of Nippon Onkyo Gakkaishi)
SN - 1346-3969
IS - 5
ER -