Acoustic end corrections for micro-perforated plates

Vahid Naderyan; Richard Raspet; Craig J Hickey; Mohammad Mohammadi

doi:10.1121/1.5129560

Acoustic end corrections for micro-perforated plates

J Acoust Soc Am. 2019 Oct;146(4):EL399. doi: 10.1121/1.5129560.

Authors

Vahid Naderyan¹, Richard Raspet¹, Craig J Hickey¹, Mohammad Mohammadi²

Affiliations

¹ Department of Physics and Astronomy, National Center for Physical Acoustics, University of Mississippi, University, Mississippi 38677, USAvahid.nad@gmail.com; raspet@olemiss.edu; chickey@olemiss.edu.
² National Center for Physical Acoustics, University of Mississippi, University, Mississippi 38677, USAm.mohammadi@outlook.com.

PMID: 31671983
DOI: 10.1121/1.5129560

Abstract

Micro-perforated plates (MPPs) are acoustically important elements in micro-electro-mechanical systems (MEMS). In this work an analytical solution for perforated plates is combined with finite element method (FEM) to develop formulas for the reactive and resistive end effects of the perforations on the plate. The reactive end effect is found to depend on the hole radius and porosity. The resistive end effect is found to depend on hole radius only. FEM is also used to develop an understanding of the loss mechanism that corresponds to the resistive end effects. The developed models can be used in optimization studies of the MEMS and MPPs.