Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Larynx

Larynx

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...

Resonance and Hybrid Structures

Resonance and Hybrid Structures

According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.

Sound Waves: Interference

Sound Waves: Interference

Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...

Anatomy of Respiratory System I: Upper Respiratory Tract

Anatomy of Respiratory System I: Upper Respiratory Tract

The upper respiratory tract plays a vital role in the respiratory system, comprising several structures that facilitate air intake and prepare air for the lungs. It also serves as the first line of defense against pathogens and particles. This tract includes the nose and nasal cavity, the oral cavity, the paranasal sinuses, and the pharynx, each with specific functions and features.
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract.

Sound as Pressure Waves

Sound as Pressure Waves

Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...

Sound Waves

Sound Waves

Sound waves can be thought of as fluctuations in the pressure of a medium through which they propagate. Since the pressure also makes the medium's particles vibrate along its direction of motion, the waves can be modeled as the displacement of the medium's particles from their mean position.
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well. Hence,...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Reducing Fiber-Induced Honeycomb Artifacts and Low-Light Noise in Nasal High-Speed Video Laryngoscopy: A Fast, Deterministic, Open-Source Approach.

Journal of voice : official journal of the Voice Foundation·2026

Same author

Nanosecond Structure of Radical Pair Intermediates from High-Frequency Quantum Oscillations: Insight into the Q<sub>A</sub><sup>•-</sup> to Q<sub>B</sub> Electron Transfer Step in Purple Bacterial Photosynthesis.

The journal of physical chemistry. B·2026

Same author

Influence of Execution Speed of an Ascending Glissando on Vocal Stability of Vocally Untrained and Professionally Trained Subjects.

Journal of voice : official journal of the Voice Foundation·2026

Same author

Glottal Area Waveform Measurements for Healthy Female and Male Speakers in Typical, High-Frequency, and Soft Phonation.

Journal of speech, language, and hearing research : JSLHR·2026

Same author

Physics-informed neural network for predicting in vacuo vocal fold eigenmodes: A proof of concept study.

JASA express letters·2026

Same author

Expanding the targeted protein degradation approach with small molecule chimeras directed to the 26S proteasome.

Nature communications·2026

Search research articles

Related Experiment Video

Updated: Jun 25, 2026

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication

Published on: December 2, 2011

Flow-structure-acoustic interaction in a human voice model.

Stefan Becker¹, Stefan Kniesburges, Stefan Müller

¹Department of Sensor Technology, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany. stefan.becker@lstm.uni-erlangen.de

The Journal of the Acoustical Society of America

|March 12, 2009

Summary

This summary is machine-generated.

Synthetic vocal folds reveal the Coanda effect in phonation, where airflow attaches and detaches stochastically. This fluid-structure interaction generates tonal and noise sounds, advancing our understanding of voice production.

More Related Videos

Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions

Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions

Published on: November 25, 2017

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp

Published on: February 3, 2014

Related Experiment Videos

Last Updated: Jun 25, 2026

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication

Published on: December 2, 2011

Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions

Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions

Published on: November 25, 2017

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp

Published on: February 3, 2014

Area of Science:

Biomechanics
Acoustics
Fluid Dynamics

Background:

Human phonation involves complex fluid-structure-acoustic interactions within the vocal folds.
Previous models often simplified the physical processes, limiting a full understanding of voice production.

Purpose of the Study:

To investigate the physical mechanisms of human phonation using advanced synthetic vocal fold models.
To analyze the fluid-structure-acoustic coupling during vocal fold vibration.

Main Methods:

Development of inhomogeneous synthetic vocal folds from polyurethane rubber.
Utilizing a specialized test facility simulating the vocal tract's supraglottal region.
Employing particle-image velocimetry, laser-scanning vibrometry, microphones, pressure sensors, and hot-wire probes for detailed measurements.

Main Results:

Observed flow-induced vocal fold vibrations and periodic flow fields.
Confirmed the stochastic occurrence of the Coanda effect, with flow alternately attaching to and separating from vocal folds.
Identified the generation of tonal sound from the oscillating flow field and broadband noise attributed to flow-surface interaction.

Conclusions:

The Coanda effect plays a significant, stochastic role in human phonation.
The developed synthetic vocal fold model effectively replicates key phonation dynamics.
This research provides insights into the acoustic generation mechanisms of voice production.