Title :
Results on the time-frequency characterization of the first heart sound in normal man
Author :
Oskiper, Taragay ; Watrous, Ray
Author_Institution :
Zargis Med. Corp., Princeton, NJ, USA
Abstract :
The first heart sound (S1) recorded at four standard auscultatory locations in 80 subjects is analyzed for its time-frequency characteristics. Based on the continuous wavelet transform using the Morlet wavelet function, a methodology to identify the frequency components of the first heart sound together with their time locations with respect to the beginning of each cardiac cycle is proposed. As a result, the summary time-frequency characterization of S1 obtained by this approach is reported.
Keywords :
acoustic signal processing; bioacoustics; cardiology; medical signal processing; time-frequency analysis; wavelet transforms; Morlet wavelet function; S1; asymptomatic subjects screening; cardiac cycle; computer-assisted auscultation; cost-effective technology; first heart sound; fundamental physiological events; health status differences; individual physical parameters; normal man; time-frequency characterization; Continuous wavelet transforms; Electrocardiography; Filters; Fourier transforms; Frequency conversion; Heart; Stethoscope; Time frequency analysis; Wavelet analysis; Wavelet transforms;
Conference_Titel :
Engineering in Medicine and Biology, 2002. 24th Annual Conference and the Annual Fall Meeting of the Biomedical Engineering Society EMBS/BMES Conference, 2002. Proceedings of the Second Joint
Print_ISBN :
0-7803-7612-9
DOI :
10.1109/IEMBS.2002.1134418
