Experimental and numerical investigation of the sound generation mechanisms of sibilant fricatives using a simplified vocal tract model

2018 ◽  
Vol 30 (3) ◽  
pp. 035104 ◽  
Author(s):  
Tsukasa Yoshinaga ◽  
Kazunori Nozaki ◽  
Shigeo Wada
Keyword(s):  
Numerical Investigation ◽  
Vocal Tract ◽  
Sound Generation ◽  
Sibilant Fricatives ◽  
Generation Mechanisms

DNS of a plane mixing layer for the investigation of sound generation mechanisms

2008 ◽  
Vol 37 (4) ◽  
pp. 360-368 ◽  
Author(s):  
Andreas Babucke ◽  
Markus Kloker ◽  
Ulrich Rist
Keyword(s):  
Mixing Layer ◽  
Sound Generation ◽  
Plane Mixing Layer ◽  
Generation Mechanisms

Effects of vocal tract geometrical differences on flow and sound of sibilant fricatives

2019 ◽  
Vol 146 (4) ◽  
pp. 3086-3086
Author(s):  
Tsukasa Yoshinaga ◽  
Kazunori Nozaki ◽  
Shigeo Wada ◽  
Akiyoshi Iida
Keyword(s):  
Vocal Tract ◽  
Sibilant Fricatives

scholarly journals Derivation of Lighthill’s Eighth Power Law of an Aeroacoustic Quadrupole in Acoustic Spacetime

Acoustics ◽  
2020 ◽  
Vol 2 (3) ◽  
pp. 666-673
Author(s):  
Drasko Masovic ◽  
Ennes Sarradj
Keyword(s):  
Power Law ◽  
Sound Propagation ◽  
Dimensional Manifold ◽  
Sound Waves ◽  
Sound Generation ◽  
Speed Of Light ◽  
Acoustic Analogy ◽  
Analytical Treatment ◽  
Weak Perturbation ◽  
Generation Mechanisms

Acoustic spacetime is a four-dimensional manifold analogue to the relativistic spacetime with the reference speed of light replaced by the speed of sound. It has been established primarily for the indirect studies of relativistic phenomena by means of their better understood acoustic analogues. More recently, it has also been used for the analytical treatment of sound propagation in various uniform and non-uniform flows of the background fluid. In this paper the analogy is extended and utilized to derive Lighthill’s eight power law for sound generation of an aeroacoustic quadrupole. Adding to the existing analogue theory, propagating sound waves are described in terms of a weak perturbation of the background acoustic spacetime metric. The obtained result proves that the acoustic analogy can be extended to cover both weak perturbation of the fluid due to the sound waves and certain sound generation mechanisms, at least in incompressible low Mach number flows.

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