Algorithm for detecting the first and the second heart sounds by spectral tracking |
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| Authors: | A. Iwata N. Ishii N. Suzumura K. Ikegaya |
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| Affiliation: | (1) Department of Information Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, 466 Nagoya, Japan;(2) Faculty of Engineering, Nagoya University, Furo-cho, Chikusa-ku, 464 Nagoya, Japan |
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| Abstract: | A detection algorithm for the first and the second heart sounds, which is one of the most important problems in an automatic diagnostic system for phonocardiograms, has been developed. It is based on the frequency-domain characteristics of heart sounds analysed by a linear-prediction method. The performance of the algorithm has been evaluated in 187 samples that contain 881 cardiac cycles including normal and abnormal subjects. The algorithm uses low frequency spectral tracking for the time series of the phonocardiogram. It can track spectral level smoothly so that it is fairly effective for the detection of heart sounds. This tracking procedure can be used in other applications such as electroencephalogram processing. |
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| Keywords: | First heart sounds Linear prediction Phonocardiogram Second heart sounds Spectral tracking |
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