Related Experiment Video
Updated: Jun 22, 2026
10:16
Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication
Published on: December 2, 2011
Effects of mucosal loading on vocal fold vibration
1Department of Surgery, Division of Otolaryngology Head and Neck Surgery, University of Wisconsin Medical School, Madison, Wisconsin 53792-7375, USA. tao.chao@gmail.com
Chaos (Woodbury, N.Y.)
|July 2, 2009
Summary
This study introduces a chain model to understand how mucosal loading affects vocal fold vibration and voice production. Findings show mucosal loading significantly impacts phonation threshold and instability pressures.
Area of Science:
- Biomechanics of speech production
- Vocal fold dynamics
- Acoustic phonetics
Background:
- Vocal fold vibration is crucial for voice production.
- Mucosal loading, the interaction between vocal folds and surrounding tissue, influences vocal fold dynamics.
- Understanding these interactions is key to diagnosing and treating voice disorders.
Purpose of the Study:
- To develop and analyze a chain model simulating mucosal loading effects on vocal fold vibration.
- To investigate the impact of mucosal loading on phonation threshold pressure and phonation instability pressure.
- To examine how mucosal loading influences energy distribution within the voice production system.
Main Methods:
- A chain model representing vocal folds and surrounding tissue as coupled oscillators was developed.
- Lumped masses, springs, and dampers modeled tissue properties (mass, stiffness, viscosity).
- Numerical methods were used to solve the model and analyze the effects of varying mucosal loading parameters.
Main Results:
- Phonation threshold pressure increased with damping (Rr), mass (Rm), and coupling (Rμ) constants, but decreased with stiffness (Rk) when mucosal loading was low.
- Phonation instability pressure increased with the coupling constant (Rμ) and decreased with the stiffness constant (Rk).
- Mucosal loading was found to directly influence energy distribution in voice production.
Conclusions:
- The proposed chain model effectively simulates the impact of mucosal loading on vocal fold vibration.
- Mucosal loading parameters significantly alter phonation threshold and instability pressures.
- This research highlights the direct role of mucosal loading in voice production mechanisms.
Related Concept Videos
01:21Larynx
The human larynx, often referred to as the voice box, is an intricate organ located in the neck. It serves as a pathway for air to enter the lungs during respiration and is an essential component of voice production.
Anatomy of the Larynx
The larynx consists of various components, including cartilage, muscles, and vocal cords. Its structure includes three large unpaired cartilages—the thyroid, cricoid, and epiglottis—and three smaller paired cartilages—the arytenoids, corniculates, and...
Anatomy of the Larynx
The larynx consists of various components, including cartilage, muscles, and vocal cords. Its structure includes three large unpaired cartilages—the thyroid, cricoid, and epiglottis—and three smaller paired cartilages—the arytenoids, corniculates, and...
01:25Mucosal Barrier of the Stomach
The gastric glands contain parietal cells that secrete hydrochloric acid (HCl) for digestion. The cells secrete HCl because it is highly corrosive and essential for breaking down food. To achieve this, they secrete hydrogen and chloride ions into the lumen of the gastric glands, which combine to form HCl.
Within parietal cells, carbonic acid is first formed through the reaction of water and carbon dioxide. The dissociation of carbonic acid releases bicarbonate and hydrogen ions. The bicarbonate...
Within parietal cells, carbonic acid is first formed through the reaction of water and carbon dioxide. The dissociation of carbonic acid releases bicarbonate and hydrogen ions. The bicarbonate...
01:24Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors
Peptic ulcer disease, commonly called PUD, represents a multifaceted condition characterized by disruptions in the lining of the gastrointestinal (GI) tract. Central to the protection of the gastrointestinal lining is the mucosal-bicarbonate barrier. This physiological defense mechanism is a formidable shield against the corrosive effects of gastric acid and pepsin secretion in the stomach. Its role is pivotal in maintaining the structural integrity of the stomach's inner lining. Bicarbonate,...
01:11Deformation of Member under Multiple Loadings
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
01:18Residual Stresses in Bending
In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...