Classification between normal and abnormal respiratory sounds based on stochastic approach

Hitoshi Yamamoto, Shoichi Matsunaga, Masaru Yamashita, Katsuya Yamauchi, Sueharu Miyahara

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

22 被引用数 (Scopus)

抄録

In this paper, we propose a novel classification procedure for distinguishing between normal and abnormal respiratory sounds on the basis of stochastic approach. The main characteristic of our procedure is that two stochastic models are used to detect abnormal respiratory sounds precisely: (1) hidden Markov models (HMMs) for acoustic spectral features and (2) bigram models for the occurrence of acoustic segments in each inspiratory/expiratory period. The classification procedure comprises a training process and a test process. In the training process, acoustic models for normal and abnormal respiratory sounds are trained using a transcribed database. In the test process, the classification procedure detects the segment sequence with the highest total likelihood and yields the classification results. Our procedure achieved a classification rate of 84.2% between normal and abnormal respiratory sounds. Experimental results revealed that for the classification, use of the segment bigram led to a 4.8% reduction of error rate in comparison with the classification rate of a conventional method that uses deterministic rules to describe segment sequences instead of the segment bigram.

本文言語英語
ホスト出版物のタイトル20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society
ページ4144-4148
ページ数5
出版ステータス出版済み - 2010
外部発表はい
イベント20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society - Sydney, NSW, オーストラリア
継続期間: 8月 23 20108月 27 2010

出版物シリーズ

名前20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society
5

その他

その他20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society
国/地域オーストラリア
CitySydney, NSW
Period8/23/108/27/10

!!!All Science Journal Classification (ASJC) codes

  • 音響学および超音波学

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