Phonometric Study of the Second Heart Sound in Normal Man

The fast Fourier transform (FFT) was employed to analyze the frequency spectra of the second heart sound in 19 healthy subjects. The data obtained show that the second heart sound is mainly composed of low-frequency vibrations, and that the frequency vs. amplitude spectra for the various filters do...

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Veröffentlicht in:	Japanese Heart Journal 1983, Vol.24(4), pp.557-561
Hauptverfasser:	LONGHINI, Carlo, TOSELLI, Tiziano, MASOTTI, Guido, BELLOTTI, Enrico, ANSANI, Lucia, MUSACCI, Gian Franca, MICHELINI, Sandro
Format:	Artikel
Sprache:	eng
Schlagworte:	Adult Biological and medical sciences Fast Fourier transform Fourier Analysis Fundamental and applied biological sciences. Psychology Heart Heart Auscultation - methods Heart Sounds - methods Humans Phonocardiography - methods Second heart sound Spectral analysis Spectrum Analysis Vertebrates: cardiovascular system
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Beschreibung
Zusammenfassung:	The fast Fourier transform (FFT) was employed to analyze the frequency spectra of the second heart sound in 19 healthy subjects. The data obtained show that the second heart sound is mainly composed of low-frequency vibrations, and that the frequency vs. amplitude spectra for the various filters do not exceed 150Hz. The different spectra obtained can represent a useful reference to compare with pathological acoustical findings.
ISSN:	0021-4868 1348-673X
DOI:	10.1536/ihj.24.557