Dynamics of temporal variations in phonatory flow.

The Journal of the Acoustical Society of America
Michael H KraneTimothy Wei

Abstract

This paper addresses the dynamic relevance of time variations of phonatory airflow, commonly neglected under the quasisteady phonatory flow assumption. In contrast to previous efforts, which relied on direct measurement of glottal impedance, this work uses spatially and temporally resolved measurements of the velocity field to estimate the unsteady and convective acceleration terms in the unsteady Bernoulli equation. Theoretical considerations suggest that phonatory flow is inherently unsteady when two related conditions apply: (1) that the unsteady and convective accelerations are commensurate, and (2) that the inertia of the glottal jet is non-negligible. Acceleration waveforms, computed from experimental data, show that unsteady and convective accelerations to be the same order of magnitude, throughout the cycle, and that the jet flow contributes significantly to the unsteady acceleration. In the middle of the cycle, however, jet inertia is negligible because the convective and unsteady accelerations nearly offset one another in the jet region. These results, consistent with previous findings treating quasisteady phonatory flow, emphasize that unsteady acceleration cannot be neglected during the final stages of the phonation...Continue Reading

References

Feb 1, 1995·The Journal of the Acoustical Society of America·B H Story, I R Titze
Mar 1, 1994·Journal of Voice : Official Journal of the Voice Foundation·I R Titze
Aug 1, 1997·The Journal of the Acoustical Society of America·L MongeauR A Kubli
Oct 26, 2002·The Journal of the Acoustical Society of America·Zhaoyan ZhangSteven H Frankel
Mar 27, 2003·The Journal of the Acoustical Society of America·G C J HofmansA Hirschberg
Jan 13, 2004·The Journal of the Acoustical Society of America·M DevergeA Hirschberg
Aug 27, 2005·The Journal of the Acoustical Society of America·Michael H Krane
May 20, 2006·The Journal of the Acoustical Society of America·Bogdan R KucinschiTerry T M Ng
Sep 29, 2006·The Journal of the Acoustical Society of America·Michael H Krane, Timothy Wei
Feb 6, 2008·The Journal of the Acoustical Society of America·Michael KraneTimothy Wei

❮ Previous
Next ❯

Citations

Mar 19, 2014·Journal of Biomechanics·Liran OrenEphraim Gutmark
Feb 24, 2015·The Journal of the Acoustical Society of America·Liran OrenSid Khosla
Sep 3, 2021·The Journal of the Acoustical Society of America·Mohsen Motie-ShiraziByron D Erath

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

The Journal of the Acoustical Society of America
Michael H KraneTimothy Wei
Journal of Voice : Official Journal of the Voice Foundation
F Alipour, R C Scherer
© 2021 Meta ULC. All rights reserved