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Multiparametric display of vocal dysfunction: Use of radar chart.
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- KAWAMURA YUJI
- Department of Otolaryngology, School of Medicine, Ehime University
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- OKAMURA HIROSHI
- Department of Otolaryngology, School of Medicine, Ehime University
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- YUMOTO EIJI
- Department of Otolaryngology, School of Medicine, Ehime University
Bibliographic Information
- Other Title
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- レーダーチャート方式による発声機能表示法の試み
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Description
The authors proposed a new method of the multiparametric display of vocal function using a radar chart. The purpose is to visualize the degree and feature of vocal dysfunction in various laryngeal diseases. The parameters analyzed were the fundamental frequency (F0), intensity of the voice, the transglottic air flow rate (F.R.) and AC/DC ratio of the expiratory air flow, which were simultaneously recorded during phonation of the vowel /a/ in the following five different fashions: easy, high-loud, high-soft low-loud and low-soft. The radar chart for easy phonation consists of four axes (F0, Intensity, F.R. and AC/DC ratio) arranged rectangularly, and the scales were determined to give a regular square for normal subjects. The radar charts for high and low pitched voices consist of six axes (F.R. and AC/DC ratio of loud and soft voices respectively, Fα and Intensity), and the scales were determined to give a regular hexagon for normal subjects. <br>The new display was valuable for investigating the degree and feature of vocal dysfunction and for judging therapeutic effects.
Journal
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- Nippon Jibiinkoka Gakkai Kaiho
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Nippon Jibiinkoka Gakkai Kaiho 89 (4), 448-454, 1986
Japanese Society of Otorhinolaryngology-Head and neck surgery
