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- W4319841777 abstract "Purpose The purpose of this study was to investigate the voice characteristics in patients with nasal congestion and enlarged pharyngeal tonsils.Materials and Methods Twenty-two children with an adenoidal-nasopharyngeal (AN) ratio of <0.5 and nasal cavity resistance of ≤0.25 Pa/cm3/s were assigned to the normal group. Twenty-five children with an AN ratio of <0.5 and nasal cavity resistance of ≥0.5 Pa/cm3/s were classified into the nasal congestion group. Nineteen children with an AN ratio of ≥0.63 and nasal cavity resistance of ≤0.25 Pa/cm3/s were defined as the enlarged pharyngeal tonsils group. The test sound /N/ has a characteristic antiformants (AF). The fourth formant (F4), the formant frequency, was calculated to relativize formant frequencies that vary with vocal tract length. The AF divided by F4 (AF/F4) was also calculated.Results The group with enlarged pharyngeal tonsils had the largest AF/F4. The nasal breathing group had the next largest AF/F4, and the normal group had the smallest AF/F4.Conclusion Stenosed vocal tracts with nasal congestion or enlarged pharyngeal tonsils showed an increased frequency due to obstruction of ventilation, and the AF/F4 ratio in the enlarged pharyngeal tonsils group was greater than that of the nasal congestion group. Voice analysis is a potential no-invasive method of distinguishing between nasal congestion and enlarged pharyngeal tonsils." @default.
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- W4319841777 date "2023-01-02" @default.
- W4319841777 modified "2023-09-26" @default.
- W4319841777 title "Voice characteristics in patients with nasal congestion and enlarged pharyngeal tonsils" @default.
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- W4319841777 doi "https://doi.org/10.1080/27705781.2022.2164832" @default.
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