Computational methods for the acoustic modal analysis of an enclosed fluid with application to a loudspeaker cabinet

Kirkup, Stephen Martin orcid iconORCID: 0000-0002-9680-7778 and Jones, M.A. (1996) Computational methods for the acoustic modal analysis of an enclosed fluid with application to a loudspeaker cabinet. Applied Acoustics, 48 (4). pp. 275-299. ISSN 0003682X

Warning
There is a more recent version of this item available.

[thumbnail of Publisher's post-print for classroom teaching and internal training purposes at UCLan] PDF (Publisher's post-print for classroom teaching and internal training purposes at UCLan) - Published Version
Restricted to Registered users only

3MB

Official URL: http://dx.doi.org/10.1016/0003-682X(95)00065-H

Abstract

Computational methods for the acoustic modal analysis of an enclosed fluid are considered. The finite element method is outlined and methods based on the boundary integral equations are reviewed. The discretization of the boundary integral equation results in a non-linear eigenvalue problem. However, through a polynomial approximation with respect to the wavenumber, the non-linear eigenvalue problem is reduced to a standard generalized eigenvalue problem. Methods based on this are applied to the test problems of the axisymmetric three-dimensional cases of a sphere and a cylinder. The physical importance of the interior acoustic resonances of a loudspeaker is discussed. An acoustic modal analysis of an axisymmetric loudspeaker interior is carried out using this method and the results are compared with results from the finite element method and experimental results.


Available Versions of this Item

Repository Staff Only: item control page