A theoretical model of a new electrostatic transducer incorporating fluidic amplification

Alan J. Walker, A.J. Mulholland, Ewan Campbell, G. Hayward

Research output: Contribution to conferencePaper

6 Citations (Scopus)
75 Downloads (Pure)

Abstract

This article concerns the design of a new electrostatic transducer whose backplate consists of a series of drilled pipes. A new one-dimensional model is derived which considers the interaction of the membrane with the air load, the air cavities, and the drilled pipes in the backplate. Dynamic equations for the impedance in each component of the device are calculated analytically and connected using interface conditions of continuity of pressure and radiation conditions into the air load. The model is able to produce solutions to the mechanical impedance of the device and the displacement of the membrane as a function of the device's design parameters. Model results for the output pressure compare well with previous experimental data. The inverse problem of retrieving the design parameters for a desired output is discussed.
Original languageEnglish
Pages1409-1412
Number of pages3
Publication statusPublished - 2008
Event2008 IEEE International Ultrasonics Symposium - Beijing, China
Duration: 1 Jan 1900 → …

Conference

Conference2008 IEEE International Ultrasonics Symposium
CityBeijing, China
Period1/01/00 → …

Keywords

  • electrostaic transducer
  • fluidic amplification

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