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Related Experiment Video

Updated: Dec 25, 2025

A Lightweight, Headphones-based System for Manipulating Auditory Feedback in Songbirds
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Using visual feedback to enhance intonation control with a variable pitch electrolarynx.

Noor Al-Zanoon1, Vijay Parsa2, Philip C Doyle2

  • 1Department of Communication Sciences and Disorders, University of Alberta, 116 Street and 85 Avenue, Edmonton, Alberta T6G 2R3, Canada.

The Journal of the Acoustical Society of America
|April 3, 2020
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Summary

This study shows visual feedback improved pitch control for electrolarynx (EL) users. Training enhanced finger force accuracy, aiding post-laryngectomy speech.

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Area of Science:

  • Speech-language pathology
  • Biomedical engineering
  • Human-computer interaction

Background:

  • Electrolarynx (EL) speech requires significant user control for intelligibility.
  • Pitch control is a critical but challenging aspect of EL speech production.
  • Current training methods for electrolarynx users may lack sufficient feedback mechanisms.

Purpose of the Study:

  • To evaluate the efficacy of visual feedback in improving pitch control for electrolarynx speakers.
  • To explore the potential of a pressure-sensitive onset-controlled electrolarynx (EL) with visual feedback.
  • To gather preliminary data for developing a clinical training protocol.

Main Methods:

  • A proof-of-concept study involving one healthy adult participant.
  • Utilized a pressure-sensitive onset-controlled electrolarynx (EL) with computer-generated visual feedback.
  • Conducted five training sessions over three weeks, analyzing force control accuracy.

Main Results:

  • Demonstrated improvement in finger (thumb) force control accuracy from the initial to the final training session.
  • Quantified changes in force control accuracy, indicating learning and adaptation.
  • Provided objective data on the impact of visual feedback on EL speech control.

Conclusions:

  • Visual feedback shows promise for enhancing pitch control in electrolarynx users.
  • The findings support the development of multimodal training protocols for post-laryngectomy speech rehabilitation.
  • Further research is warranted to validate these results in a clinical population.