Acoustical Physics

, Volume 47, Issue 3, pp 353–360 | Cite as

Two-Channel Processing of Signals for the Separation of Breath and Cardiac Sounds

  • A. G. Rudnitskiĭ


An algorithm based on the two-channel processing and the confluence analysis techniques is proposed for obtaining the averaged spectra of additive components of a nonstationary random signal. A numerical experiment demonstrating the efficiency of the proposed algorithm is conducted. The algorithm is tested using a real signal recorded at a human thorax and including breath and cardiac sounds and a stationary background noise.


Background Noise Acoustical Physic Sound Signal Breath Sound Reconstructed Spectrum 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1.
    H. Pasterkamp, C. Carson, D. Daien, and Y. Oh, Chest 96, 1405 (1989).CrossRefGoogle Scholar
  2. 2.
    N. Gavrialy and C. S. Irving, in Proceedings of 24th International Lung Sounds Conference (Inst. of Physiology, Marburg, 1999), p. 17.Google Scholar
  3. 3.
    Understanding Digital Breath Sounds Technology (Karmel Medical Acoustic Technologies LTD, Sensor Medics, Israel, 1999) (CD-ROM).Google Scholar
  4. 4.
    G. Charbonneu, J. L. Raccineux, M. Sudraud, and E. Tuchais, J. Appl. Physiol. 55, 1120 (1983).Google Scholar
  5. 5.
    N. Gavrialy, Y. Palti, and G. Alroy, J. Appl. Physiol. 53, 307 (1981).Google Scholar
  6. 6.
    Y. Ploysongsang, V. K. Iyer, and P. A. Ramamoorthy, Respiration 58, 158 (1991).CrossRefGoogle Scholar
  7. 7.
    H. Pasterkamp, R. Fenton, A. Tal, and V. Chernick, Am. Rev. Respir. Dis. 131, 61 (1985).Google Scholar
  8. 8.
    V. K. Iyer, P. A. Ramamoorthy, and Y. Ploysongsang, IEEE Trans. Biomed. Eng. 33, 1143 (1986).Google Scholar
  9. 9.
    V. K. Iyer, P. A. Ramamoorthy, and Y. Ploysongsang, IEEE Trans. Biomed. Eng. 36 (11) (1989).Google Scholar
  10. 10.
    S. Charleston and M. R. Azimi-Sadjadi, IEEE Trans. Biomed. Eng. 43, 421 (1996).CrossRefGoogle Scholar
  11. 11.
    Y. Ploysongsang, Respir. Physiol. 53, 203 (1983).CrossRefGoogle Scholar
  12. 12.
    Y. Ploysongsang, R. R. Martin, W. R. D. Ross, et al., Am. Rev. Respir. Dis. 116, 187 (1977).Google Scholar
  13. 13.
    V. T. Grinchenko, A. P. Makarenkov, and A. G. Rudnitski”, Tekh. Akust., No. 11, 12 (1996).Google Scholar
  14. 14.
    A. P. Makarenkov and A. G. Rudnitskiĭ, Akust. Zh. 41, 272 (1995) [Acoust. Phys. 41, 234 (1995)].Google Scholar
  15. 15.
    A. N. Tikhonov and M. V. Ufimtsev, Statistical Treatment of Experimental Results (Mosk. Gos. Univ., Moscow, 1988).Google Scholar
  16. 16.
    J. S. Bendat and A. G. Piersol, Random Data: Analysis and Measurement Procedures (Wiley, New York, 1986; Mir, Moscow, 1989).MATHGoogle Scholar

Copyright information

© Rudnitskiĭ 2001

Authors and Affiliations

  1. 1.Institute of HydromechanicsNational Academy of Sciences of UkraineKievUkraine

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