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Related Experiment Video

Updated: Jul 10, 2026

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

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Published on: November 25, 2017

Vocal efficiency in tracheoesophageal phonation.

Wilko Grolman¹, Simone E J Eerenstein, Rinze A Tange

¹Department of ENT and Head & Neck Surgery, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105AZ Amsterdam, the Netherlands. w.grolman@amc.uva.nl

Auris, Nasus, Larynx

|October 26, 2007

Summary

Tracheoesophageal voice (TE-voice) production requires more effort and is less efficient than natural laryngeal voice. However, TE-voice efficiency increases with sound intensity, similar to healthy voice production.

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Last Updated: Jul 10, 2026

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Area of Science:

Laryngology
Speech Science
Bioacoustics

Background:

Voice rehabilitation after total laryngectomy presents significant challenges.
Understanding neoglottis function is crucial for improving voice production.
Vocal efficiency quantifies the energy transformation during voice production.

Purpose of the Study:

To measure and calculate vocal efficiency in patients with tracheoesophageal voice.
To assess the aerodynamic and acoustic parameters of voice production post-laryngectomy.
To compare the efficiency of tracheoesophageal voice with laryngeal voice.

Main Methods:

Eight laryngectomees using tracheoesophageal voice participated.
Aerodynamic and acoustic quantities were measured using specialized transducers.
Vocal efficiency was calculated by dividing sound power by aerodynamic power.

Main Results:

Aerodynamic power levels indicated the effort required for speech production.
Results detailed power usage and production across various phonatory tasks.
Data was collected using a computer setup with multiple transducers.

Conclusions:

Aerodynamic power serves as a metric for voice generation effort.
Tracheoesophageal voice production is less efficient than laryngeal voice production.
TE-voice efficiency increases with sound intensity, mirroring healthy vocal fold behavior.