Scattering of focused ultrasonic beams by cavities in a solid half-space

Ehsan Kabiri Rahni, Talieh Hajzargarbashi, Tribikram Kundu

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The ultrasonic field generated by a point focused acoustic lens placed in a fluid medium adjacent to a solid half-space, containing one or more spherical cavities, is modeled. The semi-analytical distributed point source method (DPSM) is followed for the modeling. This technique properly takes into account the interaction effect between the cavities placed in the focused ultrasonic field, fluid-solid interface and the lens surface. The approximate analytical solution that is available in the literature for the single cavity geometry is very restrictive and cannot handle multiple cavity problems. Finite element solutions for such problems are also prohibitively time consuming at high frequencies. Solution of this problem is necessary to predict when two cavities placed in close proximity inside a solid can be distinguished by an acoustic lens placed outside the solid medium and when such distinction is not possible.

Original languageEnglish (US)
Pages (from-to)718-727
Number of pages10
JournalJournal of the Acoustical Society of America
Issue number2
StatePublished - Aug 2012

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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