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In order to discriminate normal and abnormal heart sounds (HSs) accurately and effectively, a new method for clinical diagnosis of the heart valve diseases is proposed. The method is composed of three stages. The first stage is the preprocessing stage. During the pre-processing stage, the improved wavelet threshold shrinkage denoising algorithm is used for the noise reduction of the measured HSs....
In order to analyze the feature of heart sound accurately and effectively, this paper presents a feature analysis approach of heart sound based on the improved Hilbert-Huang Transform after a large number of analysis of heart sounds in time frequency domain. The validity of the proposed method has been verified through Empirical Mode Decomposition (EMD) for a typical vibratory. Calculating and obtaining...
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