Modeling of acoustic-structural coupling in a MEMS hydrophone

H. T. Johnson, L. Prevot

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The coupling of acoustics and structural dynamics is of primary importance in the design of MEMS based microphones for use in liquid environments. A three-dimensional finite element study of acoustic-structural coupling is presented here for such a MEMS hydrophone system. The experimental system under consideration, currently under development at Boston University, consists of a horn to amplify incoming sound, a sub-micron thin plate resonator, and a Helmholtz resonator cavity to amplify the measurable response. The finite element results, which consist of steady state pressure fields in the fluid medium and steady state displacements of the resonating plate, compare favorably to experimental results. The effects of acoustic and structural resonances in each of the components of the system are explored, and it is shown that a nonuniform composite plate resonator provides a smoother broadband response in the frequency range of interest than a uniform plate.

Original languageEnglish (US)
Title of host publication2000 International Conference on Modeling and Simulation of Microsystems - MSM 2000
EditorsM. Laudon, B. Romanowicz
Pages261-264
Number of pages4
StatePublished - Dec 1 2000
Externally publishedYes
Event2000 International Conference on Modeling and Simulation of Microsystems - MSM 2000 - San Diego, CA, United States
Duration: Mar 27 2000Mar 29 2000

Publication series

Name2000 International Conference on Modeling and Simulation of Microsystems - MSM 2000

Other

Other2000 International Conference on Modeling and Simulation of Microsystems - MSM 2000
CountryUnited States
CitySan Diego, CA
Period3/27/003/29/00

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Keywords

  • Acoustics
  • Hydrophone
  • Mems
  • Resonator
  • Silicon

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Johnson, H. T., & Prevot, L. (2000). Modeling of acoustic-structural coupling in a MEMS hydrophone. In M. Laudon, & B. Romanowicz (Eds.), 2000 International Conference on Modeling and Simulation of Microsystems - MSM 2000 (pp. 261-264). (2000 International Conference on Modeling and Simulation of Microsystems - MSM 2000).