Can anyone tell me the features in frequency domain for heart sounds such as normal, murmur, artifact, and extrasystole?

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Alireza Nejati

For classification of heart sounds, the wavelet domain has proven to be more promising. You may want to look at the "Classifying heart sounds workshop" in 2012, of which 2 of the 3 finalists used wavelet transformations (links here: http://www.peterjbentley.com/heartworkshop/#results). Especially, this paper covers some more detail: www.peterjbentley.com/heartworkshop/challengepaper3.pdf‎