Recording and processing aneurysmal vibration signals in dogs

M. Sun, L. N. Sekhar, R. J. Sclabassi, J. F. Wasserman, H. B. Blue, K. A. Luyckx

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A specially designed computerized acoustic aneurysm detection system has been developed and used for recording the acoustic signal produced by aneurysms in dogs. Two transducer types, a modified horn-coupled microphone and a microvascular intra-operative Doppler flowmeter have been used. The results show that the aneurysm signal is time-varying and that a stronger vibration signal can be obtained if a proximal stenosis presents. With direct contact recording, the acoustic signals from aneurysms and parent arteries show different characteristics that can be easily distinguished. The aneurysm signals are processed by spectrograms, and a smoothing technique for suppressing noise is introduced.

Original languageEnglish
Pages (from-to)336-342
Number of pages7
JournalJournal of Biomedical Engineering
Issue number4
StatePublished - Jul 1988


  • Vibration signal
  • non-invasive aneurysm detection
  • time-varying signal processing


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