Existence of the third heart sound is an indication of heart failure. In this paper, a novel method is proposed to detect the presence of the third heart sound. A time-frequency analysis method, Hilbert-Huang transform, was used to decompose the signal adaptively and to acquire the instantaneous frequency. Further extraction of the maximal instantaneous frequency and its magnitude is performed to a heart sound signal to distinguish the third heart sound which is usually with lower frequency as well as lower amplitude. A frequency-magnitude distribution was plotted, and the results showed the difference between a normal heart sound and a heart sound with the third heart sound.
CITATION STYLE
Tseng, Y. L., Lin, K. S., Ko, P. Y., & Jaw, F. S. (2009). Detection of the third heart sound using Hilbert-Huang transform. In IFMBE Proceedings (Vol. 25, pp. 1811–1813). Springer Verlag. https://doi.org/10.1007/978-3-642-03882-2_481
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