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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Bibliographic Details
Published inJapanese Heart Journal Vol. 24; no. 4; pp. 557 - 561
Main Authors LONGHINI, Carlo, TOSELLI, Tiziano, MASOTTI, Guido, BELLOTTI, Enrico, ANSANI, Lucia, MUSACCI, Gian Franca, MICHELINI, Sandro
Format Journal Article
LanguageEnglish
Published Tokyo International Heart Journal Association 01.01.1983
Japanese Heart Journal Association
Subjects
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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Summary: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.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0021-4868
1348-673X
DOI:10.1536/ihj.24.557