Scaling behavior in crackle sound during lung inflation

B. Suki, A. M. Alencar, Z. Hantos, F. Petak, J. Tolnai, T. Asztalos, S. Zapperi, J. S. Andrade, S. V. Buldyrev, H. E. Stanley

Research output: Conference contribution

Abstract

During slow inflation of lung lobes, we analyzed a sequence of short explosive transient sound waves called `crackles,' each consisting of an initial spike followed by ringing. The crackle time series is irregular, with the distribution of spike size s following a power law, n(s) to approximately s (α = 2.77±0.05). We develop a model of crackle wave generation and propagation in a tree structure. The agreement between experiment and simulations suggests that (i) the irregularities are a consequence of structural heterogeneity in the lung and (ii) the scaling is a result of successive attenuations acting on the sound spikes as they propagate through a cascade of bifurcations along the airway tree.

Original languageEnglish
Title of host publicationAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
PublisherIEEE
Number of pages1
ISBN (Print)0780356756
Publication statusPublished - dec. 1 1999
EventProceedings of the 1999 IEEE Engineering in Medicine and Biology 21st Annual Conference and the 1999 Fall Meeting of the Biomedical Engineering Society (1st Joint BMES / EMBS) - Atlanta, GA, USA
Duration: okt. 13 1999okt. 16 1999

Publication series

NameAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume1
ISSN (Print)0589-1019

Other

OtherProceedings of the 1999 IEEE Engineering in Medicine and Biology 21st Annual Conference and the 1999 Fall Meeting of the Biomedical Engineering Society (1st Joint BMES / EMBS)
CityAtlanta, GA, USA
Period10/13/9910/16/99

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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    Suki, B., Alencar, A. M., Hantos, Z., Petak, F., Tolnai, J., Asztalos, T., Zapperi, S., Andrade, J. S., Buldyrev, S. V., & Stanley, H. E. (1999). Scaling behavior in crackle sound during lung inflation. In Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings (Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings; Vol. 1). IEEE.