Phonometric Study of the Second Heart Sound in Normal Man

Carlo LONGHINI; Tiziano TOSELLI; Guido MASOTTI; Enrico BELLOTTI; Lucia ANSANI; Gian Franca MUSACCI; Sandro MICHELINI

doi:10.1536/ihj.24.557

Carlo LONGHINI, Tiziano TOSELLI, Guido MASOTTI, Enrico BELLOTTI, Lucia ANSANI, Gian Franca MUSACCI, Sandro MICHELINI

著者情報

キーワード: Second heart sound, Spectral analysis, Fast Fourier transform

ジャーナルフリー

1983 年 24 巻 4 号 p. 557-561

DOI https://doi.org/10.1536/ihj.24.557

詳細

抄録

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.

責任著者(Corresponding author)

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