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Fundamental frequency histograms measured by electroglottography during speech: a pilot study for standardization
Romain E Kania1, Dana M Hartl, Stéphane Hans
1Voice, Biomaterials and Head and Neck Oncology Research Laboratory, University Paris V, Department of Otorhinolaryngology-Head and Neck Surgery, Georges Pompidou European Hospital, Paris, France.
Summary
This study created a reference database for electroglottography (EGG) fundamental frequency (Fo) in normal speech. This provides a baseline for diagnosing and managing voice disorders in dysphonic patients.
Area of Science:
- Laryngology
- Speech Science
- Acoustic Phonetics
Background:
- Accurate measurement of fundamental frequency (Fo) is crucial for diagnosing voice disorders.
- Existing electroglottography (EGG) databases lack standardization for connected speech analysis.
- Reference data for normal Fo in running speech is needed for clinical applications.
Purpose of the Study:
- To develop a standardized database for electroglottographic measurement of fundamental frequency (Fo) in normal subjects during connected speech.
- To establish reference ranges for Fo in healthy male speakers of French.
- To provide a tool for the diagnosis and follow-up of dysphonic patients.
Main Methods:
- Prospective pilot study involving 20 healthy male volunteers.
- Electroglottographic recordings of speaking Fo during connected speech using two distinct French texts.
- Development of normalized Fo histograms with 5th and 95th percentile markers.
Main Results:
- Fo histograms demonstrated sensitivity to variations in speaking Fo between different text prosodies.
- Normalized Fo histograms effectively represented the range and distribution of speaker Fo.
- Low variability (<5%) was observed with more than 15 subjects, indicating reliability.
Conclusions:
- A graphic display of standardized EGG Fo measurements in connected speech was successfully designed.
- Fo variability is influenced by text phonetic content and spoken language.
- Country-specific or laboratory-specific normal Fo histograms are necessary for accurate clinical assessment.