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Updated: Oct 1, 2025
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Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions
Published on: November 25, 2017
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Vocal Tract and Subglottal Impedance in High Performance Singing: A Case Study
Patrick Hoyer1, Monika Riedler2, Carmen Unterhofer3
1Department of Research, Fraunhofer Headquarters, Munich, Germany.
Summary
Subglottal resonances significantly impact the singing voice, influencing vocal formants in high-performance singers. This study highlights their importance for vocal training and professional singing techniques.
Area of Science:
- Acoustics
- Vocal Physiology
- Singing Voice Research
Background:
- The respiratory process and airflow are critical in vocal training and professional singing.
- The role of subglottal resonances in high-performance singing is hypothesized but not fully understood.
Purpose of the Study:
- To investigate the influence of subglottal resonances on the singing voice.
- To determine the importance of subglottal resonances in high-performance singing.
Main Methods:
- A prospective, single-subject study was conducted with a professional soprano.
- Vocal tract impedance spectra were measured during phonation of vowels [a], [e], [i], [o], [u] at pitch d4.
- Measurements were taken with a deterministic noise source during exhalation and inhalation at closed glottis.
Main Results:
- Vowel impedance spectra demonstrated vowel-dependent resonances with both open and closed glottis.
- Reproducible measurements of phonated vowels were achieved.
- Vocal tract and subglottal resonances were identified and analyzed.
Conclusions:
- Subglottal resonances were found to influence the first formant and the singer's formant cluster.
- The findings support the importance of subglottal resonances in high-performance singing.
- A simple, lightweight instrumental setup was validated for measuring vocal tract and subglottal resonances.
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