ArticlePLoS computational biology2021
Vocalization with semi-occluded airways is favorable for optimizing sound production.
Article in PLoS computational biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06934265 (Phonation Resistance Training Exercises), which is not on this map. Cited by 8 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Phonation Resistance Training Exercises (PhoRTE®) Delivered In-person and Via Telehealth: A Noninferiority Randomized Clinical Trial
Who cites it
8 citing papers in PubMed.
- Comparative Study of Two Semi-Occluded Vocal Tract Protocols: A Randomized Clinical Trial.Journal of speech, language, and hearing research : JSLHR · 2024Trial
- Optimizing Diameter, Length, and Water Immersion in Flow Resistant Tube Vocalization.Journal of voice : official journal of the Voice Foundation · 2025Article
- Stress Effects on Pharyngeal Air Pressure and Upper Esophageal Sphincter Pressure During Phonation: The Influence of Vocal Tract Semi-Occlusion.Journal of voice : official journal of the Voice Foundation · 2025Article
- Characterization of upper esophageal sphincter pressures relative to vocal acoustics.Journal of applied physiology (Bethesda, Md. : 1985) · 2025Article
- Pressure Distributions in Glottal Geometries With Multichannel Airflows.Journal of voice : official journal of the Voice Foundation · 2024Article
- Sound Visualization Demonstrates Velopharyngeal Coupling and Complex Spectral Variability in Asian Elephants.Animals : an open access journal from MDPI · 2022Article
- Voice efficiency for different voice qualities combining experimentally derived sound signals and numerical modeling of the vocal tract.Frontiers in physiology · 2022Article
- Regulation of laryngeal resistance and maximum power transfer with semi-occluded airway vocalization.The Journal of the Acoustical Society of America · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
Abstract
Vocalization in mammals, birds, reptiles, and amphibians occurs with airways that have wide openings to free-space for efficient sound radiation, but sound is also produced with occluded or semi-occluded airways that have small openings to free-space. It is hypothesized that pressures produced inside the airway with semi-occluded vocalizations have an overall widening effect on the airway. This overall widening then provides more opportunity to produce wide-narrow contrasts along the airway for variation in sound quality and loudness. For human vocalization described here, special emphasis is placed on the epilaryngeal airway, which can be adjusted for optimal aerodynamic power transfer and for optimal acoustic source-airway interaction. The methodology is three-fold, (1) geometric measurement of airway dimensions from CT scans, (2) aerodynamic and acoustic impedance calculation of the airways, and (3) simulation of acoustic signals with a self-oscillating computational model of the sound source and wave propagation.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.