Rapid high-resolutionwavenumber extraction from ultrasonic guidedwaves using adaptive array signal processing

Shigeaki Okumura, Vu Hieu Nguyen, Hirofumi Taki, Guillaume Haïat, Salah Naili, Toru Sato

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Quantitative ultrasound techniques for assessment of bone quality have been attracting significant research attention. The axial transmission technique, which involves analysis of ultrasonic guided waves propagating along cortical bone, has been proposed for assessment of cortical bone quality. Because the frequency-dependent wavenumbers reflect the elastic parameters of the medium, high-resolution estimation of the wavenumbers is required at each frequency with low computational cost. We use an adaptive array signal processing method and propose a technique that can be used to estimate the numbers of propagation modes that exist at each frequency without the need for time-consuming calculations. An experimental study of 4-mm-thick copper and bone-mimicking plates showed that the proposed method estimated the wavenumbers accurately with estimation errors of less than 4% and a calculation time of less than 0.5 s when using a laptop computer.

Original languageEnglish
Article number652
JournalApplied Sciences (Switzerland)
Issue number4
Publication statusPublished - 2018 Apr 23
Externally publishedYes


  • Axial transmission
  • Signal processing
  • Ultrasonic guided waves

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation
  • Engineering(all)
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes


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