Pipe organ air-coupled broad bandwidth transducer

B. Zhu, B. Tiller, J.F.C. Windmill, A.J. Mulholland, A.J. Walker

Research output: Contribution to conferencePaperpeer-review

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Air-coupled transducers are used to conduct fast non-contact inspections in NDT. Normally, the bandwidth of a conventional transducer can be enhanced, but with a cost to its sensitivity. However, low sensitivity is very disadvantageous in air-coupled devices. This paper presents a methodology for improving the bandwidth of an air-coupled micro-machined ultrasonic transducer (MUT) without sensitivity loss by connecting a number of resonating pipes of various length to a cavity in the backplate. The design is inspired by the pipe organ musical instrument, where the resonant frequency (pitch) of each pipe is mainly determined by its length.
Original languageEnglish
Number of pages4
Publication statusPublished - 6 Sep 2017
Event2017 IEEE International Ultrasonics Symposium, IUS 2017 - Washington, United States
Duration: 6 Sep 20179 Sep 2017


Conference2017 IEEE International Ultrasonics Symposium, IUS 2017
Abbreviated titleIEEE IUS 2017
Country/TerritoryUnited States
Internet address


  • air-coupled
  • broad bandwith
  • 3D print
  • NDT/E
  • ultrasonic transducer
  • MUT


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