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High-frequency components of normal and dysphonic voices
N Valencia Naranjo1, E Mendoza Lara, I Mateo Rodríguez
1Departamento de Personalidad, Evaluación, y Tratamiento Psicológico, Universidad de Granada, Spain.
Summary
Dysphonic voices exhibit higher high-frequency energy levels, particularly in the 6-16 kHz range. This vocal characteristic, analyzed in Spanish vowels, indicates voice quality differences between healthy and impaired subjects.
Area of Science:
- Speech science
- Acoustic phonetics
- Voice disorders
Background:
- High-frequency energy levels in voice analysis are speaker-dependent and indicate voice quality.
- Previous research has not fully explored specific frequency bands in dysphonic voices.
Purpose of the Study:
- To compare high-frequency energy levels (6-10 kHz and 10-16 kHz) in dysphonic and healthy voices.
- To investigate the relationship between vocal characteristics and voice disorders.
- To analyze energy differences across Spanish vowels in dysphonic and healthy speakers.
Main Methods:
- Analysis of consonant-vowel syllables using stop phonemes and Spanish vowels.
- Evaluation of vocal segments to determine power spectrum averages in specific frequency intervals (6-10 kHz, 10-16 kHz).
- Comparison of energy levels between a group with dysphonic voices and a control group without voice problems.
Main Results:
- Significantly higher energy levels were found in both the 6-10 kHz and 10-16 kHz frequency bands for dysphonic voices compared to healthy voices.
- Significant energy differences were observed between vowels in the 10-16 kHz region for dysphonic voices.
- A progressive decrease in energy from front to back vowels was noted in the 10-16 kHz range.
Conclusions:
- High-frequency energy in the 6-16 kHz range serves as a significant indicator of voice quality and can differentiate between dysphonic and healthy voices.
- The distribution of energy across vowels in the 10-16 kHz band may offer further insights into the nature of dysphonia.