(Semi‐)automatic pitch‐synchronous computation of glottal flow

1989 ◽  
Vol 86 (S1) ◽  
pp. S36-S36
Author(s):  
Jacques Koreman ◽  
Ben Cranen
Keyword(s):  
Synchronous Computation ◽  
Glottal Flow

scholarly journals Effect of Subglottic Stenosis on Vocal Fold Vibration and Voice Production Using Fluid–Structure–Acoustics Interaction Simulation

2021 ◽  
Vol 11 (3) ◽  
pp. 1221
Author(s):  
Dariush Bodaghi ◽  
Qian Xue ◽  
Xudong Zheng ◽  
Scott Thomson
Keyword(s):  
Flow Rate ◽  
Vocal Fold ◽  
Flow Resistance ◽  
Signal To Noise Ratio ◽  
Area Ratio ◽  
Subglottic Stenosis ◽  
Fluid Structure ◽  
Voice Production ◽  
Vocal Fold Vibration ◽  
Glottal Flow

An in-house 3D fluid–structure–acoustic interaction numerical solver was employed to investigate the effect of subglottic stenosis (SGS) on dynamics of glottal flow, vocal fold vibration and acoustics during voice production. The investigation focused on two SGS properties, including severity defined as the percentage of area reduction and location. The results show that SGS affects voice production only when its severity is beyond a threshold, which is at 75% for the glottal flow rate and acoustics, and at 90% for the vocal fold vibrations. Beyond the threshold, the flow rate, vocal fold vibration amplitude and vocal efficiency decrease rapidly with SGS severity, while the skewness quotient, vibration frequency, signal-to-noise ratio and vocal intensity decrease slightly, and the open quotient increases slightly. Changing the location of SGS shows no effect on the dynamics. Further analysis reveals that the effect of SGS on the dynamics is primarily due to its effect on the flow resistance in the entire airway, which is found to be related to the area ratio of glottis to SGS. Below the SGS severity of 75%, which corresponds to an area ratio of glottis to SGS of 0.1, changing the SGS severity only causes very small changes in the area ratio; therefore, its effect on the flow resistance and dynamics is very small. Beyond the SGS severity of 75%, increasing the SGS severity, leads to rapid increases of the area ratio, resulting in rapid changes in the flow resistance and dynamics.

Measurement of Glottal Flow Efficiency. Using a Siren-type Laryngeal Model.

1999 ◽  
Vol 92 (7) ◽  
pp. 789-800
Author(s):  
Masanao OHKAWA ◽  
Nobuhiko ISSHIKI
Keyword(s):  
Glottal Flow

scholarly journals Effect of vocal fold asymmetries on glottal flow

2016 ◽  
Vol 126 (11) ◽  
pp. 2534-2538 ◽  
Author(s):  
Liran Oren ◽  
Sid Khosla ◽  
Ephraim Gutmark
Keyword(s):  
Vocal Fold ◽  
Glottal Flow

Numerical simulation of glottal flow

2013 ◽  
Vol 43 (12) ◽  
pp. 2177-2185 ◽  
Author(s):  
A. Hundertmark-Zaušková ◽  
R. Lehmann ◽  
M. Hess ◽  
F. Müller
Keyword(s):  
Numerical Simulation ◽  
Glottal Flow
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