Acoustic analysis of ultrasonic air-borne transducer with concave structure

Chae Gyu Lim, Youngsu Cha

Research output: Contribution to journalArticlepeer-review


This paper introduces an ultrasonic transducer with a concave curved structure. The transducer is based on a concave piezoelectric film on a silicone support with an air cavity. Specifically, an air cavity exists between the piezoelectric film and the support in the shape of a curved cuboid, providing space for the film to vibrate. We build a theoretical model of a concave piezoelectric transducer. To validate the model, we demonstrate a concave piezoelectric transducer and measure the ultrasound pressure field using an acoustic imaging camera. Two types of experiments are conducted by supplying a sinusoidal input voltage with a frequency sweep and a voltage sweep. The experimental results share similarity with the theoretical results. In addition, we conduct a parametric study to analyze the characteristics of the transducer. Interestingly, we find that the radius of curvature and axial length primarily contribute to ultrasound pressure.

Original languageEnglish
Pages (from-to)479-488
Number of pages10
JournalIntelligent Service Robotics
Issue number3
Publication statusPublished - 2024 May

Bibliographical note

Publisher Copyright:
© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.


  • Concave
  • Piezoelectric
  • Ultrasonic transducer
  • Ultrasound pressure

ASJC Scopus subject areas

  • Computational Mechanics
  • Engineering (miscellaneous)
  • Mechanical Engineering
  • Artificial Intelligence


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