Medical and Biological Engineering and Computing

, Volume 21, Issue 6, pp 697–701 | Cite as

Reflection from elastic discontinuities

  • D. L. Newman
  • S. E. Greenwald
  • T. Bryant Moodie


Elastic mismatching is studied by an impulse technique. Elastic mismatches are created by joining two latex rubber tubes of the same internal diameter but different wall thickness. A short duration pressure impulse is generated at the entrance of the water-filled tube system and the transmission characteristics of the impulse are determined from a series of measurements along the tube system using a catheter-tip pressure manometer. This technique enables the magnitude and phase change of the reflection at the elastic discontinuity to be obtained. A number of tube combinations are examined and in all cases a good agreement is shown between the measured reflection coefficient and the value calculated theoretically.


Elasticity Pressure pulse Propagation Reflection 


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Copyright information

© IFMBE 1983

Authors and Affiliations

  • D. L. Newman
    • 1
  • S. E. Greenwald
    • 2
  • T. Bryant Moodie
    • 3
  1. 1.Physics DepartmentGuys Hospital Medical SchoolLondonEngland
  2. 2.Department of Morbid AnatomyThe London HospitalLondonEngland
  3. 3.Department of MathematicsUniversity of AlbertaEdmontonCanada
  4. 4.Department of Applied PhysicsRoyal Melbourne Institute of TechnologyMelbourneAustralia

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