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Enhancing Acoustic Voice Quality Through Real-Time Auditory Feedback Modulation
Isabel S Schiller1, Karolin Krüger2, Patricia Weede2
1Teaching and Research Area Work and Engineering Psychology, Institute of Psychology, RWTH Aachen University, Kackertstrasse 9, Aachen 52072, Germany.
Journal of Voice : Official Journal of the Voice Foundation
|February 12, 2026
Summary
Auditory feedback modulation (AFM) can improve voice quality. Researchers developed VQ-Synth to induce hoarseness, finding that this perturbation led to compensatory vocal adjustments that enhanced acoustic voice quality in healthy speakers.
Area of Science:
- Speech and Hearing Sciences
- Vocal Motor Control
- Acoustic Analysis
Background:
- Auditory feedback modulation (AFM) alters vocal production by modifying how speakers perceive their own voice.
- Healthy speakers typically exhibit compensatory vocal adjustments to auditory perturbations.
- The impact of voice quality degradation in auditory feedback on compensatory vocal behavior is not well understood.
Purpose of the Study:
- To introduce and validate VQ-Synth, a real-time voice resynthesis system for inducing hoarseness.
- To investigate whether hoarseness-induced auditory feedback elicits compensatory vocal adjustments that improve acoustic voice quality.
Main Methods:
- Developed VQ-Synth using an anti-peak-window method to create hoarse voice percepts.
- Conducted an AFM experiment where participants sustained vowels with real-time voice quality modulation.
- Measured acoustic voice quality using smoothed cepstral peak prominence (CPPS) in both AFM and control groups.
Main Results:
- The anti-peak-window method effectively produced a hoarse voice percept.
- Participants in the AFM group showed significant increases in CPPS during and after hoarseness perturbation.
- Control group showed no significant CPPS changes, indicating perturbation-specific effects.
Conclusions:
- Hoarseness-induced auditory feedback prompts compensatory vocal adjustments that enhance acoustic voice quality.
- VQ-Synth is a viable tool for studying vocal motor control responses to voice quality perturbations.
- Findings suggest potential therapeutic applications for VQ-Synth in treating dysphonia.
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