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Resonance Characteristics in Epiglottic Cyst: Formant Frequency, Vowel Space Area, Vowel Articulatory Index, and Formant Centralization Ratio

  • YeonWoo Lee
    Affiliations
    Department of Otorhinolaryngology-Head and Neck Surgery, and Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea
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  • Hee June Park
    Affiliations
    Deptartment of Speech and Hearing Therapy, Catholic University of Pusan, Busan, South Korea
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  • In Ho Bae
    Affiliations
    Deptartment of Speech-Language Pathology, Kosin University, Busan, South Korea
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  • GeunHyo Kim
    Correspondence
    Address correspondence and reprint requests to GeunHyo Kim, Department of Otorhinolaryngology-Head and Neck Surgery, and Biomedical Research Institute Pusan National University Hospital, 179, Gudeok-ro, Seo-gu 49241, Busan, Republic of Korea.
    Affiliations
    Department of Otorhinolaryngology-Head and Neck Surgery, and Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea
    Search for articles by this author
Published:October 10, 2021DOI:https://doi.org/10.1016/j.jvoice.2021.09.008

      Abstract

      Objectives

      Resonance characteristics can change due to alterations in the shape of the vocal tract in patients with epiglottic cysts. This study aimed to analyze the resonance characteristics before and after the surgical excision of epiglottic cysts.

      Methods

      Twelve male patients with epiglottic cysts were enrolled in this study. We analyzed the first and second formants (F1 and F2) in vowels /a/, /e/, /i/, /o/, and /u/, vowel space area (VSA), vowel articulatory index (VAI), and formant centralization ratio (FCR). We measured these parameters before and after the surgical excision of epiglottic cysts.

      Results

      There was a significant increase in the F1 values of /a/, VSA, and VAI, and a significant decrease in the value of FCR after the surgery.

      Conclusion

      We confirmed the change in the resonance characteristics in patients with epiglottic cysts. It is considered that further studies on epiglottic cysts and resonance changes are needed in the future.

      Key Words

      Abbreviations:

      F (formant frequency), F1 (first formant), F2 (second formant), VSA (vowel space area), VAI (vowel articulatory index), FCR (formant centralization ratio)
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