Reduction of heart sound interference from lung sound signals using empirical mode decomposition technique

被引：36

作者：

Mondal A. ^{[1
]}

Bhattacharya P.S. ^{[1
]}

Saha G. ^{[1
]}

机构：

[1] Department of Electronics and Electrical Communication Engineering, Indian Institute of Technology, Kharagpur

来源：

Journal of Medical Engineering and Technology | 2011年 / 35卷 / 6-7期

关键词：

Empirical mode decomposition (EMD); Heart sound (HS); Lung sound (LS); Power spectral density (PSD); Spectrogram;

D O I：

10.3109/03091902.2011.595529

中图分类号：

学科分类号：

摘要：

During the recording time of lung sound (LS) signals from the chest wall of a subject, there is always heart sound (HS) signal interfering with it. This obscures the features of lung sound signals and creates confusion on pathological states, if any, of the lungs. A novel method based on empirical mode decomposition (EMD) technique is proposed in this paper for reducing the undesired heart sound interference from the desired lung sound signals. In this, the mixed signal is split into several components. Some of these components contain larger proportions of interfering signals like heart sound, environmental noise etc. and are filtered out. Experiments have been conducted on simulated and real-time recorded mixed signals of heart sound and lung sound. The proposed method is found to be superior in terms of time domain, frequency domain, and timefrequency domain representations and also in listening test performed by pulmonologist. © 2011 Informa UK, Ltd.

引用

页码：344 / 353

页数：9

共 19 条

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