Ultrasonic characterization of liquids using resonance antireflection

M. Hirnschrodt, A. V. Jena, T. Vontz, B. Fischer, R. Lerch

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


This paper presents an ultrasonic method for measuring the density of liquids with a solid layer separating a reference fluid and a test fluid. By adjusting the frequency of the exciting signal according to the thickness of the layer, it is possible to generate destructive interference of the waves reflected at the first and at the second boundary of the layer. Thus, the layer appears to vanish for the incident waves. The resulting echo signal depends only on the acoustic impedances of the reference fluid and the test fluid and the density which is of interest can be extracted. Short and long-term drifts of the electronics and the ultrasonic transducer implied are eliminated by using the well-known pulse–echo technique with additional frontwave detection.
Original languageEnglish
Pages (from-to)200-205
Number of pages6
Issue number1
Publication statusPublished - Mar 2000
Externally publishedYes


  • Antireflection
  • Density
  • Liquids
  • Resonance
  • Ultrasonic


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