A new method for automatic wheeze detection

M. Waris, Panu Helistö (Corresponding Author), S. Haltsonen, Ari Saarinen, A. Sovijärvi

    Research output: Contribution to journalArticleScientificpeer-review

    27 Citations (Scopus)


    A new automatic wheeze detection method which is based on image processing techniques applied to the sonagram was developed here. In the calculation of the sonagram, autoregressive and FFT spectrum estimation methods were compared. The method was validated in four wheezing asthmatic patients by a pulmonary physician. Nine out of ten wheezes longer than 250 ms were detected. Very short wheezes were not detected. The false positive amount of wheezing in control subjects was only about 1%. The method extracts also information about the frequency, duration, flow and volume associated with the wheezes.
    Original languageEnglish
    Pages (from-to)33-40
    JournalTechnology and Health Care
    Issue number1
    Publication statusPublished - 1998
    MoE publication typeNot Eligible


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