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This document compares three algorithms for extracting the envelope curves from cardiac sound signals: (1) the normalized average Shannon energy, (2) the envelope of the Hilbert transform, and (3) the cardiac sound characteristic waveform (CSCW). It examines the performance of these algorithms under different noise levels and discusses their advantages and disadvantages. Experimental results on normal and abnormal cardiac sounds are used to evaluate the algorithms for segmenting heart sounds into the first

Author

gopal

Language

EN