非侵襲嚥下機能評価を目的とした嚥下音の時間－周波数分析

• Published in: Transactions of Japanese Society for Medical and Biological Engineering Vol. 54Annual; no. 28PM-Abstract; p. S409
• Main Authors: 阿岸, 鉄三, 山内, 忍, 本橋, 由香, 可児, 雅弥, 佐藤, 敏夫
• Format: Journal Article
• Language: Japanese
• Published: 公益社団法人 日本生体医工学会 2016; Japanese Society for Medical and Biological Engineering
• ISSN: 1347-443X; 1881-4379
• DOI: 10.11239/jsmbe.54Annual.S409

This study defined parameters expressing the temporal positional relationship of the three components of swallowing sounds, by approximating swallowing sound signals with a three-dimensional spline curve, and proposes a method for quantifying swallowing function. We also explored a method for automatically detecting signals representing swallowing function from among multiple swallowing sound signals obtained during the measurement time. An approximation curve with three peaks corresponding to the three sounds composing the swallowing sound was obtained. The T expressing the relative position of the second sound to the continuous time of the overall swallowing sound was determined from the T1 and T2 obtained from the approximation curve, enabling quantitative evaluation of swallowing function. Moreover, swallowing sound signals that represented the swallowing function of the subject could be automatically detected from among multiple swallowing sound signals obtained from the subject.