how to separate out the lung sounds from heart sounds ?
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i am doing my ME project in BMI please help me to sort out the prob.
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Answers (4)
Wayne King
on 20 Sep 2011
Are these sounds separated in approximately disjoint frequency intervals? In other words, can you separate them in the frequency domain? In that case, you can use a filter.
Andreas Goser
on 20 Sep 2011
You need to provide FAR more information for a useful answer. "Separation" can't be the ultimate goal. Separation will be an intermediate step to do analasyis on lung or heart signal, right? It is also unclear if this is a post processing or real-time.
Approach: Assuming the heart signal has higher frequency than lung, not many changes in frequency (that depends on your application) and not much noise, I suggest to make a frequency analysis to identify heartbeat frequency and filter that out with a relatively low band filter.
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Wayne King
on 21 Sep 2011
Hi Chandrasekhar, There are a number of free MATLAB toolboxes on the web for computing information-theoretic measures. The paper abstract you have copied and pasted above employs these measures. Perhaps you can obtain one of these free toolboxes and try to replicate the methods in the cited paper.
Here is one such toolbox:
Wayne
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Lucas García
on 21 Sep 2011
You can use adaptfilt in the DSP toolbox for adaptive noise canceling. A "similar" example can be found in the toolbox: separating maternal heartbeat from fetal heartbeat.
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