Tidal Volume Level Estimation Using Respiratory Sounds

被引:1
作者
Wang L. [1 ]
Jiang Z. [1 ]
机构
[1] Graduate School of Science and Engineering, Yamaguchi University, Yamaguchi
基金
日本学术振兴会;
关键词
Compendex;
D O I
10.1155/2023/4994668
中图分类号
学科分类号
摘要
Respiratory sounds have been used as a noninvasive and convenient method to estimate respiratory flow and tidal volume. However, current methods need calibration, making them difficult to use in a home environment. A respiratory sound analysis method is proposed to estimate tidal volume levels during sleep qualitatively. Respiratory sounds are filtered and segmented into one-minute clips, all clips are clustered into three categories: normal breathing/snoring/uncertain with agglomerative hierarchical clustering (AHC). Formant parameters are extracted to classify snoring clips into simple snoring and obstructive snoring with the K-means algorithm. For simple snoring clips, the tidal volume level is calculated based on snoring last time. For obstructive snoring clips, the tidal volume level is calculated by the maximum breathing pause interval. The performance of the proposed method is evaluated on an open dataset, PSG-Audio, in which full-night polysomnography (PSG) and tracheal sound were recorded simultaneously. The calculated tidal volume levels are compared with the corresponding lowest nocturnal oxygen saturation (LoO2) data. Experiments show that the proposed method calculates tidal volume levels with high accuracy and robustness. © 2023 Lurui Wang and Zhongwei Jiang.
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