Yoganathan, Ajit P. and Gupta, Ramesh and Udwadia, Firdaus E. and Miller, J. Wayne and Corcoran, William H. and Sarma, Radha and Johnson, John L. and Bing, Richard J. (1976) Use of the fast fourier transform for frequency analysis of the first heart sound in normal man. Medical & Biological Engineering, 14 (1). pp. 69-73. ISSN 0025-696X. doi:10.1007/bf02477093. https://resolver.caltech.edu/CaltechAUTHORS:20210322-151127936
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Abstract
The first heart sound of 29 normal, young males, recorded at the apex of the heart, was analysed for the power content as a function of frequency using the technique of the fast Fourier transform. The frequency spectra were seen to contain peaks in the low-frequency range (10–50 Hz) and the medium-frequency range (50–140 Hz). The average spectrum of the entire study shows a peak at 30 Hz, and an average attenuation of the first heart sound at the apex, of 16 dB/octave. The peaks are probably related to the elastic properties of the heart muscles and the dynamic events causing the first sound. Therefore important diagnostic information might be obtained from frequency studies of heart sounds. Such studies should increase the clinical importance of phonocardiography.
| Item Type: | Article | ||||||
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| Additional Information: | © 1976 Springer. Received 16 December 1974; Accepted 01 January 1975. | ||||||
| Subject Keywords: | Biological Engineer; Frequency Spectrum; Heart Sound; Average Spectrum; Important Diagnostic Information | ||||||
| Issue or Number: | 1 | ||||||
| DOI: | 10.1007/bf02477093 | ||||||
| Record Number: | CaltechAUTHORS:20210322-151127936 | ||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20210322-151127936 | ||||||
| Official Citation: | Yoganathan, A.P., Gupta, R., Udwadia, F.E. et al. Use of the fast fourier transform for frequency analysis of the first heart sound in normal man. Med. & biol. Engng. 14, 69–73 (1976). https://doi.org/10.1007/BF02477093 | ||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
| ID Code: | 108518 | ||||||
| Collection: | CaltechAUTHORS | ||||||
| Deposited By: | Tony Diaz | ||||||
| Deposited On: | 24 Mar 2021 20:09 | ||||||
| Last Modified: | 24 Mar 2021 20:09 |
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