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
Article

Abstract

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.

Keywords

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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